Thirteen rare 18th and 19th century Aberdeen banknotes are expected to fetch about £6,000 when they go under the hammer.
The valuable black and white bills are among four hundred rare Scottish banknotes put up for sale by the Edinburgh-based Chartered Institute of Bankers in Scotland.
They will be auctioned at Spink in London’s Bloomsbury on October 4.
Barnaby Faull, head of the banknotes department at the auction house, said: “The collection of the Institute of Bankers in Scotland is the largest single Scottish group Spink have offered for many years.
“It consists of a wide range of issued notes, proofs, specimens and other material spanning the full age and range of Scottish banks.”
One of the oldest and most valuable Aberdeen notes in the auction is an unissued £20 dated August 1, 1797, and produced by the Banking Company in Aberdeen.
It is described by Spink as “very rare” and is expected to sell for between £600 and £800.
A specimen £5 produced in or around 1825 by the Aberdeen Town & County Banking Company and featuring engravings of the bank’s Aberdeen headquarters and of Union Street is expected to fetch between £400 and £500.
A forged 1825 black and white £1 featuring the words “The Banking Company In Aberdeen” and “Promise to pay to J Robson or the bearer” is valued at between £500 and £600.
The Highland capital is also represented in the sale.
A “very rare” proof of a £100 produced by the Inverness-based Caledonian Banking Company in or around 1863 and featuring engravings of Inverness Castle and the river Ness could fetch between £600 and £800.