CPC Subgroup
F41G 1/17 Convertible sights, i.e. sets of two or more sights brought into the sight line optionally
Full Title
Sighting devices (for indirect laying of fire F41G3/16; bombsights F41G3/24 ) > Rearsights > Adjusting mechanisms therefor; Mountings therefor > Convertible sights, i.e. sets of two or more sights brought into the sight line optionally