OWD:
Any chance of a better pic of the flats with the Czech import mark on the underside of the right tube next to the "50??" as well as a pic of the side of the frame? Jaroslav Holecek, like many other Czech gunmakers, looks to have concentrated on machine guns post WWII but still was able to span the full range of gunmaking in offering, possibly just importing, double guns.

Kind Regards,

Raimey
rse