1933 utility demolition hammer.
"It could cycle 20 times a minute with a drop of 5 to 10 ft., and the operator could increase force with a sharp pull on the hauling line at the top of the cycle."
More:
https://www.oemoffhighway.com/market...eystone-hammer
Previously:
Rail splitting hammer - GIF
Antique drop hammer - video
Diesel piledriving hammer - GIF
Diesel pile hammer - GIF
Pile driving with spring-assisted hammer attachment - video
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