I recently found a mid-70s Masterlock Padlock sales display with a (still locked) padlock that a bullet had blasted.
The point of the display was the locks were bullet-proof and still secure even after getting lit up by a rifle. Crude, but effective:
*** ******* **** **** *** ******** into * **** ***** **** **:
** ** * ********* ** ****-** padlocks ** **** *** ******* ********* or ************* ** **** ***********, *** 70s-era ****** ******* ***** *** ********* did * **** ***.
*** ******** **: **** *** *** most ********* ***** ******** ** ******* demo ***'** ****?
**** **** **** ** ***** ****