S.A.” – “S10-7” – “MADE FOR U.S.N.” – “ELECTRIC”. 1 3/16″ wide. Brass body. Brass shackle. Keyway: Flat with offset. “S10-7” is stamped on the obverse of the case at 12 o’clock. “MADE FOR U.S.N.” is stamped on the reverse of the body. “ELECTRIC” is stamped on the reverse of the case at 6 o’clock.