Reference tools

Tools

Standalone reference tools that work alongside the identification engine. The ones already shipped are listed first. Below them is the active roadmap — what we’re building next and roughly when.

Available now

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Tudor and Stuart mintmark dater

Preview only on Free

Pick a mintmark and see which monarchs used it, the years it was current, and the mints that issued it.

What it does

Searchable index of 130+ initial marks from Edward III through Charles II. Reverse-lookup: given a mark, get the year window. Forward-lookup: given a reign, see every mark in date order.

Who it’s for

Anyone with a hammered Tudor or Stuart silver coin trying to narrow the strike date. Especially Charles I where the mark date-stamps the coin to within a year or two.

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Coin grading photo gallery

Free

Side-by-side photos showing what Poor, Fair, Fine, Very Fine and Extremely Fine actually look like on real UK coins.

What it does

Visual reference for the UK adjectival grading scale (Poor → Uncirculated) with worked examples and what-to-look-for checklists. Currently a starting reference set — being expanded with more denominations and periods.

Who it’s for

Anyone trying to grade a coin by eye, especially newcomers learning what 'Very Fine' really means in numismatic practice rather than colloquial English.

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Treasure Act wizard + FLO directory

Free — safety-critical

Step-by-step decision tree of whether your find triggers the 1996 Treasure Act, with contact details for every Finds Liaison Officer.

What it does

Walks the actual Treasure Act 1996 criteria — country, age, item count, metal content, prehistoric / coin / non-coin — and gives a verdict plus a clear next step. Single coins found in isolation are NOT automatically Treasure, and the wizard makes that clear.

Who it’s for

Every UK detectorist. Safety-critical because failing to report Treasure is a criminal offence — and equally important, knowing when your find is NOT Treasure stops unnecessary worry.

Coming next

The roadmap is shaped by what UK detectorists ask for. If something on this list is the one you’d use most, tell us at admin@detectid.co.uk and we’ll move it up the queue.

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Mintmark dater — extended to Edwardian and Anglo-Saxon

Coming weeks

The current dater covers Tudor and Stuart. Extending backwards to cover Edwardian privy marks (Class 9a–10cf) and Anglo-Saxon sceatta series marks.

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Comparable hammer-price lookup

Coming weeks

Type a Spink reference and see recent realised hammer prices from Hosker Haynes and Spink auction archives — without needing to upload a coin first. Already wired into the identification result page for Premium users.

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Hallmark dater — silver hallmarks

Q3 2026

Pick a town mark + date letter and get the year window for British assayed silver. Covers 1300 onwards across all assay offices.

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Roman emperor identifier

Q3 2026

Photo-based shortlist for worn Roman bronze. Walk through bust style + reverse → narrows to 3–5 likely emperors, with reign dates.

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Seal matrix / bulla identifier

Q4 2026

Lead and copper-alloy seal matrices, cloth seals, papal bullae. Read the legend and date the impression.

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Coin weight identifier

Q4 2026

Stuart-period coin weights for the gold guinea / unite series — the brass squares with a denomination engraved that detector finds turn up regularly.

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Find diary / field journal

Coming weeks

Log a detecting session — date, location, conditions, signals dug, finds kept — without spending identification credits. Builds a personal record alongside your identified collection.

Unlock the full mintmark dater on Basic

The grading gallery and Treasure Act wizard are free for everyone. The interactive mintmark dater (130+ marks, search, reverse-lookup) is part of the Basic toolkit — £1.99 / month.

See pricing