100 Pounds

Perkins Bacon had by this period developed the steel-engraved security printing techniques that made their banknote work genuinely difficult to counterfeit — a reputation built largely on postage stamp contracts but applied with equal rigour to private Scottish bank issues. The Union Bank of Scotland had been formed by merger in 1830 and operated as one of the larger Scottish joint-stock banks before its eventual absorption into the Bank of Scotland in 1955.

High-denomination Scottish private banknotes of this period rarely circulated in the ordinary sense. A £100 note in the 1860s functioned almost exclusively in commercial and interbank settlement, meaning surviving examples often show comparatively little wear — not because they were cherished, but because they changed hands infrequently and formally.

The Pick 778 designation covers a multi-year window, suggesting date or signatory variants exist within the type.