These are 144 mm bolt circle (not the early 151) for 1/8" chain. $37 each including US shipping.
1 each: 47, 51, and 52 tooth. I find no chain marks on any of them.
Would consider offers of other interesting stuff; particularly looking for really nice Italian forged steel cottered crank set (Magistroni or ???), need not be perfect. Equivalent road campy chainrings, 144 or 151. Sachs road crankset in 170 mm.
If you think the price is nuts, let me know. I might listen.
harvey sachs
mcLean va