For UK collectors: reading a silver hallmark from your phone
If you are holding a piece of silver with four small punches you cannot read, this is the page you wanted: Patina is built to let you photograph the marks on your phone and get back a maker, an era, an origin and a confidence level, written in plain English.
Patina is not open yet, so anything on this page about what it does is what it is being built to do.
Four small punches, a queue behind you, and about three minutes
It is ten past nine on a Saturday. You are two people deep at a trestle table of mixed flatware, holding a spoon with four tiny punches struck near the stem. One might be an animal. One might be a letter, or it might be a scratch and a bit of polish wear. The dealer is watching, somebody else wants the same tray, and you have a few minutes to decide whether to hand over twelve pounds or put it back.
What collectors ask each other
Forum posts in this hobby read like "I really need some help identifying this antique silver stuff I found", and they get the same first reply every time: "Photos of the marks would help." The mark is the unit of identification and everyone in the hobby knows it. Underneath sits the honest second question: is this piece worth paying an appraiser to find out about?
Why a general image search is the wrong shape of tool
Reaching for a general image search is the natural next move, and it struggles here for a structural reason rather than a brand one. Matching a whole object against pictures of similar objects is a different task from reading a punch a few millimetres across.
The silhouette of a plain English spoon has barely changed in generations, so the outline carries less information than the marks do, and the marks are the part a whole-object search is least likely to be reading.
British silver is marked as a set, not a signature
A British piece is usually marked as a group: a sponsor's or maker's mark, a standard mark for the metal, an assay office town mark and a date letter, with the shape of the shield around the letter carrying meaning alongside the letter inside it.
Read together, those punches place a piece. Read through a worn strike, a phone torch held at the wrong angle and a century of over-polishing, they place nothing at all. That is the gap this page is about.
Where Patina fits in the three minutes
Patina is made for the minutes between picking something up and putting it down. Not for the evening afterwards with the reference books open, which you will still enjoy, and not for the insurance schedule, which is a different job with a different professional attached to it.
Estate sale guidance says the same thing from the other direction: if something catches your eye but you are not sure what you are looking at, take a photo and research it before you buy. Patina is meant to be what happens between the photo and the decision. If the piece in your hand is ceramic rather than silver, our working guide to pottery marks, backstamps, numbers and dates covers how those marks behave instead.
How reading a hallmark with Patina is meant to go
- Photograph the mark, not the object
Patina runs in your phone browser, so there is nothing to install in a car park with one bar of signal. You can take the shot there and then with the device camera, or choose a photo already on your phone. Fill the frame with the punches, get the light across them rather than straight at them, and steady the piece against the table.
- Send the photo for identification
The image goes to a multimodal vision model, asked for a maker, an era, an origin and a confidence level for what it can see in the mark. Anthropic processes the photo on Patina's behalf, and the application and its database run on Amazon Web Services.
- Read a plain-English result, not a table of codes
The result screen is written the way a knowledgeable friend would say it out loud: what the model thinks the mark belongs to, roughly when and where, and how sure it is. A disclaimer stays on that screen the whole time, saying this is an AI-generated estimate rather than an expert appraisal.
- Check the confidence before you act on anything
Confidence is the part of the result that matters most at a busy table. When it falls below Patina's threshold, the result carries an appraisal triage flag and a referral link to an appraisal service, because a soft answer on a worn strike is a reason to get a person involved rather than a reason to guess louder.
- Keep the scan so the evening is easier
A signed-in account keeps your last ten scans, so the spoon you photographed at nine and the sauce boat you photographed at half past are both still there when you get home to your books. The result and history screens show a short plain-English paragraph about the maker and the period a piece comes from, not only a name and a date. You sign in with an email address and a password.
Your last ten scans, waiting at the kitchen table
Scan history holds the last ten scans on a signed-in account, so a Saturday's finds are still listed when you sit down with the reference charts. Each entry carries its plain-English result alongside a short paragraph about the maker and the period the piece comes from, rather than only a name and a date.
What the result says, and what it deliberately will not say
Patina answers one question: what is this. Maker, era, origin, and how sure the model is. It is framed as a second opinion on the knowledge you already have, because you are the one holding the object, feeling the weight of the bowl and the wear on the back of the spoon.
It will not give you a figure
There is no price estimate, no auction comparable and no range in pounds or dollars anywhere in the product, and that is a design decision rather than a missing feature.
Valuation depends on condition in the hand, on the market that week and on who is bidding, and a photograph of four punches cannot carry that. Identification is our job. Valuation is someone else's, and we would rather say so than invent a number you might act on.
It will not call the answer settled
Every result carries the AI-estimate disclaimer, and nothing here should be treated as a basis for buying, selling or insuring anything. One app comparison in this category puts the general rule well: treat any app result as a starting point, not a final verdict.
A model reading a rubbed date letter can be wrong in ways that look confident from the outside. That is exactly why Patina publishes a confidence level rather than a verdict, and why the low-confidence path ends at a human appraiser instead of a shrug.
Why this shape suits a UK silver collector
It fits the time you actually have
The whole loop is a photo and a result on a phone, which is the only workflow that survives a busy trestle table, a car boot field or a house clearance where the good box is already half sold.
It respects what you already know
You are not being told what to think. You are getting a second read on a mark you are already partway through, to confirm it, contradict it, or hand you a name worth looking up properly later.
Uncertainty is shown, not smoothed over
Worn punches, over-polished stems and part-struck date letters are ordinary in British silver. When the model cannot see enough, that shows up in the confidence level rather than in a tidy sentence that reads the same whether it is right or not.
The low-confidence answer goes somewhere useful
Below the threshold, the result is flagged for appraisal and offers a referral link, so "I cannot find this hallmark anywhere" turns into a next step rather than a dead end. Those links go to independent services we have no partnership with.
No number to be wrong about
Because Patina never produces a value, nothing on the result screen can tempt you into a sale price you later regret. The question "is it worth anything" stays with the person qualified to answer it.
A running record of the morning
Your last ten scans stay in your history, which is enough to reconstruct a Saturday's finds at the kitchen table with the reference charts open beside you.
Where Patina helps and where it hands over
| What you are asking | What Patina does | What still needs a person |
|---|---|---|
| What is this mark and who might have made it | Returns a suggested maker, era and origin from a photo, with a confidence level | Confirming a specific sponsor's punch against assay office records |
| Is it period or a later copy | Gives an era estimate and says how sure it is | Judging construction, wear, weight and repairs in the hand |
| Is it worth anything | Nothing. Patina never produces a value, by design | An appraiser or auction specialist who can value the object |
| Is it worth paying for an appraisal | Flags the result for appraisal when confidence is low and offers a referral link | The appraiser's own assessment and fee |
| Can I rely on this for a sale or for insurance | States plainly, on every result, that this is an AI-generated estimate | A written appraisal from a qualified professional |
What it costs
Free
Free
The occasional finder or inheritance receiver who meets an unfamiliar object a few times a year and needs to see a real result before paying anything.
- Scans per month: 3
- Scan history: Last 10 scans
- Maker, era and origin from a photo
- Honest confidence level on every result
- Appraiser referral when a result needs an expert eye
- Scan history of your last 10 scans
Unlimited
$6.99 / month
The estate sale regular or serious thrift shopper who meets unfamiliar objects several times a month and wants to scan every one of them.
- Scans per month: Unlimited
- Scan history: Last 10 scans
- Dollar values: Not provided
- Unlimited scans every month
- Maker, era and origin from a photo
- Honest confidence level on every result
Questions
How do I read a UK silver hallmark myself?
Work through the punches as a set rather than one at a time. A British piece typically carries a sponsor's or maker's mark, a standard mark for the metal, an assay office town mark and a date letter, and the shield shape around the date letter matters as much as the letter inside it. Patina's job is to give you a second read on that set from a photo, with a confidence level, so you know whether to trust your own reading or keep digging.
Does Patina decode each punch separately?
It reads the photo and returns a suggested maker, era and origin with a confidence level, written in plain English, along with a short paragraph about the maker and the period. Think of it as a knowledgeable second opinion on the mark as a whole, rather than a field-by-field chart lookup, and treat a low confidence level as the signal to go to an appraiser.
Is there a free version?
Yes. The free plan is three identifications a calendar month, enforced server side, and it includes the confidence level, the appraiser referral when a result needs an expert eye, and your last ten scans in history. Unlimited scans are $6.99 a month.
Will it tell me what my silver is worth?
No, and that is deliberate. Patina never produces a value, a price range or an auction comparable. Identification is our job; valuation belongs to an appraiser or an auction specialist who can handle the object and read the market that week.
What happens when the hallmark is too worn to read?
That is where the confidence level earns its place. When confidence falls below Patina's threshold, the result is flagged for appraisal and offers a referral link to an appraisal service, which are independent services we have no partnership with. A soft answer on a rubbed strike is an honest answer, not a failure.
Why is the price in US dollars if I am in the UK?
The unlimited plan is priced in US dollars at $6.99 a month. The website takes no payment at all: the plan is sold inside the Patina phone app through the App Store and Google Play, and the phone app is not in the stores yet, so there is nothing to buy here today.
Do I need to install anything?
No. Patina works from a mobile browser, taking a photo with the device camera or using one already on your phone. You sign in with an email address and a password to keep your scan history.
Where are my photos kept, and can I have them deleted?
Your photos and their results are stored while your account exists, so your history keeps working, and they sit on Amazon Web Services in the United States. Anthropic processes the photos to identify the object, Stripe keeps the subscription record behind the unlimited plan, and Amazon SES sends account email. Once you are signed in you can download a copy of your data and delete your account from Settings in the product. If you cannot sign in, write to Patina at hello@kaleidoapps.com, which is also the address for a security problem; under UK GDPR a request for a copy of your data or for its erasure is answered within one month, which is the law's rule. The privacy policy at /privacy/ lists what is held, /subprocessors/ lists the services that process customer data, and the terms at /terms/ and the privacy policy name the company that sells Patina and give its registered details.