Here is a Porsche 956 gear. Not sure which transaxle gear this is, but beginning top left at 11:00 o'clock it is stamped 1 circle H 87, than 160090 VM, then a 20 in what looks like pencil, then 32/21 scratched into the surface, then 777 underlined, also scratched into the surface, than 4-26 screatched, than what looks lie + g+c (or e), then 956. Not sure what all the numbers and letters mean.
CW