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my family owned multiple soviet knives that looked kinda like this but the blade had like 3 teeth (idk it's kinda like serrated blade but irregular)
it worked rather well unlike traditional soviet can openers, but because of brittle soviet metal all of the blades got chipped
since it's soviet it's probably a replica of some western shit but I can't even find a picture of anything like it on the internets. I wish I could buy some of better quality.