The serial number fonts are not correct. The location of the serial number on the frame is wrong. FN - pre/post occupation and/or the Germans never put the numbers in the tang area.
The frame with the slot was discontinued early on in the WaA 103 range which would have been early in the German occupation.
Could be a sample where parts were unofficially removed from the factory or cobbled together from parts on hand after FN took control of the factory in 1944.
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charlie
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