One is a cal. 7.65, SN 54XXX.
Marking on the left side of the slide reads "FABRIQUE NATIONALE D'ARMES de GUERRE HERSTAL BELGIQUE" over "BROWNING'S PATENT DEPOSE"
Marking on the rigth side of the slide reads "Manufacture Francaise d"Armes & Cycles de Saint-Etienne". The magazine is marked on...