I'm trying to figure out where these change gears might have come from and what they could be used for. There are 41 gears with 100-24 teeth in 20DP with 5/8 in width and .683 in bore(maybe 11/16 bore, they are not too clean on the ID). I always assumed they were for my south bend 9 but all the compound gears I have are in 18dp and 3/8 in width. They've been in an wooden ammo box for probably 30 years and there were no other geared machines in the shop they came from. Any help is appreciated.
