---
title: "The Bank of England turned the watermark into a currency-security feature, adopting watermarked banknote paper in 1697 after its notes were counterfeited"
type: "claim"
status: "seedling"
audit_status: "flagged — rests on an American Banker trade feature (Tier 3) for a claim carrying several specific dates (1694/1695/1697) and a named mill. Historical outline uncontested, but the dates should clear the Tier 1–2 quantitative floor; not independently verified this promotion (WebFetch unavailable headless). Verification routed at [[question-verify-bank-of-england-1697-watermark-adoption-primary]].\n2026-07-12 audit (claude-fable-5, cross-model): source pointer re-verified — the American Banker page resolves, is not paywalled, and carries the quoted 1695 / 1697 / Sutton Courtenay passages verbatim. Partial clearance of the quantitative flag: the 1694 issuance and 1697 watermark-adoption dates are now corroborated at Tier 2 by the British Association of Paper Historians (\"The Bank of England has been issuing bank-notes since 1694, with simple watermarks in them since at least 1697\" — https://baph.org.uk/resources/paper-history/history-of-papermaking-in-the-uk/). Still Tier-3-only: the 1695 counterfeiting date and the Sutton Courtenay / Rice Watkins mill attribution (specialist corroboration exists at britishnotes.co.uk but that page could not be fetched directly this audit; Bank of England museum pages returned 403). Corrections applied to body: removed a \"by 1970 light-visible watermarks were standard on UK banknotes\" clause — not present in the cited American Banker article (misattributed via the capture's hop notes; the underlying event is the £20 note gaining a portrait watermark in 1970, watermarks having been on Bank paper since 1697); tightened \"the Bank's notes\" to \"the Bank's smaller-denomination notes\" per the source text. Status stays seedling; the routed question stays open for a primary / Bank-archive record of 1695 and the mill attribution.\n2026-07-23 (direct primary follow-up, went to Bank of England Quarterly Bulletin 1969 + Bank Archive court-minute indexes + British History Online): the general 1694/1697 outline is untouched, but the specific dates and mill attribution are now more precisely characterized rather than just \"still open.\" The Bank's own history is silent on a specific 1695 date, and a named secondary source (Old and New London, 1878) instead dates the first forged BoE note to 1758 — see [[claim-bank-of-england-1695-counterfeiting-date-unconfirmed-1758-rival-account]]. The Bank's own bibliography names its earliest documented paper-supply contract as 1724 (Henry Portal), and never mentions Sutton Courtenay or Rice Watkins — see [[claim-bank-of-england-1724-portal-contract-earliest-confirmed-not-1697-sutton-courtenay]]. The Bank's earliest surviving note (1697) is handwritten and unwatermarked, distinct from the claimed watermark-adoption event — see [[claim-bank-of-england-1697-surviving-note-handwritten-not-watermarked]]. Bank Archive court-minute manuscripts (G4/3, G4/8) covering exactly this period were located but OCR-illegible this session. Status stays seedling; question stays open.\n"
source_url: "https://www.americanbanker.com/news/watermarks-an-appreciation-for-a-timeless-feature-of-currency"
source_title: "Watermarks: An Appreciation for a Timeless Feature of Currency"
source_author: "American Banker"
source_date: "2026-07-09T00:00:00.000Z"
source_quote: "After some were counterfeited in 1695, the Bank of England had to find a way to secure them. So beginning in 1697, the Sutton Courtenay Mill... manufactured watermarked paper with a loop pattern."
source_tier: 3
provenance: "Promotion from 10-inbox/raw/2026-07-09-hop-watermark-paper-to-llm.md, 2026-07-11"
origin: "hop-batch"
writer_model: "claude-opus-4-8"
derived_from: ["10-inbox/raw/2026-07-09-hop-watermark-paper-to-llm.md"]
date_created: "2026-07-11T00:00:00.000Z"
tags: ["currency","banknotes","watermarks","security","anti-counterfeiting","history-of-the-book"]
audits: ["2026-07-12 claude-fable-5"]
drafted_in: ["2026-07-13-a-fake-needs-a-body","a-fake-needs-a-body"]
---


Roughly four centuries after the watermark appeared as a papermaker's brand
([[claim-watermarks-originated-as-papermakers-mark-in-fabriano-1282|Fabriano, 13th century]]),
the same physical trick was repurposed as anti-counterfeiting technology. The
Bank of England, founded in 1694, issued paper banknotes that were counterfeited
soon after; according to American Banker, "after some were counterfeited in 1695,
the Bank of England had to find a way to secure them," and beginning in 1697 the
Sutton Courtenay Mill manufactured watermarked paper with a loop pattern for the
Bank's smaller-denomination notes.

The shift is one of *function*, not mechanism: the mark is still an image formed
in the substance of the sheet, visible against light and integral to the paper —
but its purpose moved from private branding (identifying the mill) to public
verification (proving a note was genuine, i.e. issued by the authority whose paper
carried the mark). The security value is exactly the property that made it a good
maker's mark: hard to reproduce without the mould, invisible to casual inspection,
impossible to add after the fact.

The move also opened an arms race. By the 1790s, per the same American Banker
feature, watermark counterfeiting had itself become a tool of political sabotage
(English papermakers sympathetic to loyalists forging the light-and-dark
watermarks of revolutionary French currency) — the same attack-and-defense
cycle that later recurs around machine-text watermarking
([[claim-kirchenbauer-2023-green-red-list-llm-watermark]] and its paraphrasing
attacks). The full 750-year through-line is drawn in
[[observation-watermark-same-provenance-mechanism-paper-to-llm]].

**Why this note is `seedling` and flagged.** The episode is uncontested history,
but the specific dates (1694 founding, 1695 counterfeiting, 1697 adoption) and the
Sutton Courtenay attribution rest on a Tier-3 trade feature; under sources.md's
quantitative floor these want a primary source (Bank of England archive or a
numismatic history). The numbers are recorded but flagged
`[unverified-quant — needs primary]`; verification is routed at
[[question-verify-bank-of-england-1697-watermark-adoption-primary]].

*Update 2026-07-12 (cross-model audit):* the 1694 issuance and 1697 adoption
dates now carry Tier-2 corroboration — the British Association of Paper
Historians states "The Bank of England has been issuing bank-notes since 1694,
with simple watermarks in them since at least 1697"
(https://baph.org.uk/resources/paper-history/history-of-papermaking-in-the-uk/),
which also records [[entity-henry-portal|Henri de Portal]] taking over the watermarked banknote-paper
contract in December 1724. The 1695 counterfeiting date and the Sutton
Courtenay / Rice Watkins attribution remain on Tier-3 sourcing, so the flag and
the routed question stay open for those specifics.