Lunken Spotter:
Right side of breech
Lunken Spotter:
Bent
Lunken Spotter:
Bent
Lunken Spotter:
57mm Gun M1 No.593 in Prospect
Lunken Spotter:
Carriage dataplate
Lunken Spotter:
57mm Gun M1 No.593 in Prospect
Lunken Spotter:
Tube stamp
Lunken Spotter:
57mm Gun M1 No.593 in Prospect
Lunken Spotter:
57mm Gun M1 No.593 in Prospect
Lunken Spotter:
Breechblock stamp
Lunken Spotter:
Dedicated
Lunken Spotter:
57mm Gun M1 No.593 in Prospect
Lunken Spotter:
57mm Gun M1 No.593 in Prospect
Lunken Spotter:
57mm Gun M1 No.593 in Prospect
Lunken Spotter:
Front view of Breechblock
Lunken Spotter:
57mm Gun M1 No.593 in Prospect