Explosively activated punch.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...1_fullsize.jpg
Fullsize image: https://s3-us-west-1.amazonaws.com/h...2_fullsize.jpg
Fullsize image: https://s3-us-west-1.amazonaws.com/h...3_fullsize.jpg
1942 patent is here.
More: https://imgur.com/a/MEdgQKT
Previously:
Punch-activated flamethrower - GIF
Miniature punch press - video
Key punch - GIF
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