Original U.S. Signals, Underwater Sound (SUS) MK 57 Dummy “Practice Depth Charge” - Inert Uniforms it looks as though the

it looks as though the scabbard body is made of aluminum

and really is a choice example

so there is no front sight

there are stress cracks on the left and right side of the liner with very minor fraying on the rim

and was definitely an upmarket version

Original U.S. Signals, Underwater Sound (SUS) MK 57 Dummy “Practice Depth Charge” - Inert Uniforms it looks as though theOriginal Item: Only One Available. This is a wonderful example of a hard to find Practice Depth Charge, Mk 57 Signals, Underwater Sound Dummy device. This is an inert, practice device and was never intended to be used as an explosive device nor can it be used as such. It is in total compliance per the current BATF regulations governing ordnance. Not Available For Export The SUS is a small, expendable, bomb shaped device 3 inches in diameter and 15 or