1 Pound Union Bank of Scotland

Perkins, Bacon & Petch brought steel-plate intaglio printing to British banknote production at a time when the technique was still relatively novel in commercial note work — their anti-forgery credentials were built on the same technology used for early adhesive postage stamps, including the Penny Black. Union Bank of Scotland was one of several Scottish issuers who contracted London printers rather than rely on Edinburgh trade, a practical choice given Perkins Bacon's established security infrastructure.

Scottish commercial bank notes of this period circulated with a legal status distinct from Bank of England paper — they were liabilities of the issuing bank, not legal tender, but accepted by convention throughout Scotland.