Soviet box of "what"?

[weberoed]

Some other EOD guys trying to figure oout what is in this box, no other pics (yet) found on an ols sub base - any ideas? I do not believe the P-C means lewiste, that would have been PC, TMK could be the nomenclature of a Soviet antitank mine, B could mean fuze included, the triangle I think is a explosive hazard warning, but coould be a manufacturing ID - trying to make letters match - which basicaly means I am guessing

Grim Reaper decal - never saw that before either

 

[Edwardc]

this is in the balaklava subterranean submarine base in the crimea. I wonder what was in them to

 

[weberoed]

that's the point, may be a SovietTMK AT landmine with fuze, but it needs confirmation