socket bayonet, cruciform section and screwdriver tip, for Berdan II rifle & Model 1870
Socket form: tubular socket with high bridge in rear reinforce, zigzag attachment slot and screw-adjustable locking ring. Note semi-circular raised stop pin. Long neck emerging almost at right angle from underside of fore-end.
Blade form: asymmetrical high cruciform section, tapering towards 6mm-wide screwdriver tip. All four faces of blade fluted.
Imperial Russian Model 1870 ('Berden 2') socket bayonet.
RF (indistinct) / Cyrillic character resembling II in circle / arrow
1 in circle / Cyrillic character resembling letter 'K'