Don-
Regarding:
A used then shelved approx. 1974 PX-10
While at the moment $30 plus shipping is cheap consider:
Possible kickstand damage Possible seat stay rack damage, although there is tape between the rack and the frame Steel Rigida rims, a poor choice to escape sew-ups and the wrong diameter. As you noted, pedal exchange, good for tennis shoes, but not a great pedal, in line with the rims though. From the Dubois lug era, not the popular Nervex Pro lugset. Possible problematic packing for shipment. "We know how to pack bikes..."
Worth the price of admission right now, but not without peril. Auction house states 23", probably a correct center to top measure.
John Jorgensen
Palos Verdes Ca USA