I have an unusual chainring FS. Its a pre '67 campagnolo one, 52 teeth for 3/32nd chains.
The unusual bit is the large shoulder on the inside of the teeth circle. This makes it look like a track chainring although they are narrow 3/32nd chain teeth.
Can any one shed any light on what this was for?
Condition is used but Ok ish, surface is dull but not hugely scratched. Teeth have plenty of life left. $55 including airmail.
Regards
Martin Coopland, Scotland, http://www.BatesBicycles.com