Marc - I'm sure your eyes are better by far with the chainring in hand than mine are at several hundred miles, but I wonder if this might be a Roger Durham (later Bulls Eye) elliptical ring?
harvey sachs mcLean va PLEASE NOTE NEW EMAIL ADDRESS.
I've got a set of 49D crank arms with dust caps in good shape, not perfect but no bad. 170 in length. They come with a an extreme eliptical 51 tooth chainring. A friend told me who made the ring but I forgot the name, he said it was from the late 60's early 70's. reminds a bit of a chainsaw. it's stamped CR on one side and with a 2 on the other. could throw in some alloy caged lyotard pedals.
I'm looking for a TA 3 arm pro crankset, in decent condition, does not need to be perfect. email me for pics.
marc garcia
chicago IL