"United States Navy Padlocks - Chicago Lock Co."
 

Click to Enlarge Image "U.S.N. ELECTRIC" - "CHICAGO LOCK CO PIN TUMBLER CHICAGO, ILL. MADE IN U.S.A.". 1 1/8" wide x 3/16" shackle diameter x 5/8" shackle clearance. Brass case. Brass shackle. 4 pin tumbler. Made for: United States Navy. Mfg by: Chicago Lock Co.
"The Mike Pitman Collection" 
6490