At the end of WWII in 1945, assuming there were only a couple thousand examples passing thru the Ferlach proofhouse as per the Nitro proof Ferlach stamp/NP sub F, #1016 would have passed thru in Summer of 1945 and as Jani indicated may have been made for a British officer. It was the Brits that established the maker number series. Then post 1954 the longarm was imported into England and there appears to be a date on the left hand corner of the left tube.

Kind Regards,

Raimey
rse