Bank of Oporto, a skit note of unknown purpose promising to pay WIlliam Thomas the sum of £100, December 1820, serial number 54321, with wording and design perilously close to a real banknote, very good and very scarce
Outing unlisted £120-£160

This lot was sold as part of a special collection, The Sir David Kirch Collection of Skit Notes.

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It has not been possible to discover who William Thomas was, but it seems probably that he was the producer of the note and was simply promising to pay himself £100. The relevance of Oporto is likewise unclear.
Similar in design to the following lot, to the extent it seems likely it was produced by the same person.