Mark 21. Sard Bu Aero U.S. Navy F.S.S.C. 88-B-320 (7 x 50)

No serial#

WWII US NAVY BU AERO 7X50 MARK 21 BINOCULARS SARD

The binoculars are marked: “BU AERO. U.S. NAVY”, “F.S.S.C. R88-B-320”.

The rubber eyecups are still usuable.