While not dissenting from any of the above, the potential buyer should recognize that the (baseball player) Ted Williams had an endorsement deal with Sears that put his name on a wide variety of sporting goods, not all of which Ted had actual used in his professional career. This included basket balls, ping pong balls, pogo sticks, I don't know, all kinds of stuff. Some of the bicycles were 531. Most were not. Caveat emptor.
...and the 7.5 HP outboard on the family skiff of my childhood.