Can't find this one. Seems to be from Denmark with 1875 Postmark from Banholm. Banholm appears to be part of Finland. Revenue? Thanks for your help.
David
I have been looking into this a bit more and I might be right. Before 1885, Banholm was the name of the town that is now called Bandholm. It was the terminal station of the Banholm-Maribo railroad, established in 1869.
The line was closed in 1952 and the station is now a small railroad museum
The building plan for Banholm station (note the spelling)
A picture of how it looks nowadays (photo taken June 2020)