1 Pound Royal Bank of Scotland

Scottish banks retained the right to issue their own £1 notes long after the Bank of England's monopoly tightened over English provincial issuers — a distinction preserved by the Treaty of Union and fiercely defended. The Royal Bank's £1 was a working note, the backbone of everyday commerce in Scotland, and this series ran across half a century and five successive signatories.

The Speed signature period overlaps with a brief dual-signatory arrangement — both Lunan and Speed appear on notes dated within the same window, which can cause dating confusion when signatures are read without reference to specific issue dates.