Five pounds could be worth more than £200 at an auction this weekend.
Chrystals Auctions is holding a sale at its rooms on Allan Street in Douglas from 10am on Saturday, June 13.
Among the lots are 10 Manx 50p notes, which were withdrawn in 1989 and ceased being legal tender in 2013.
They're expected to fetch between £180 and £220 when the hammer falls.
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