I was wondering if there is any serial number to date of build information on these guns. Does anyone know whewn they were built and what years? TIA
I don’t even know what TIA means. But this may help: https://www.nramuseum.org/media/940941/serialization-date of manufacture.pdf
I do believe the FN 150 was not imported here in the U.S. If I am correct, it was a European model, seems it was close to the medalist. Does yours say "practice" anywhere on it.
No, but if your gun was made in 1975 or later it may have the letter code to date it with. Failing that, it may have a letter annale. https://www.shotgunworld.com/threads/belgian-shotgun-identification-guide.232252/