Took the morning off and went to Ottawa this morning to fetch the wheels. PrepTech did a really nice job. I didn't think they'd be able to 'retrieve' the stampings on a couple of the more surface-rusted wheels, but they did. Very nice work. It also reveiled that perhaps there was more than one type of wheel supplier in 1960. Four of the wheels have three stampings, namely the "S" in a diamond; the year they were made ("/59"); plus the part number ("231601"). One wheel, however, just has the part number, in a small font.
Looking good!
The stamping fully revealed (only legible on a single wheel previously):
Also tested the thermostat, by immersing it in hot water as per the workshop manual. Nice to see the bellows open at exactly the correct temperature (168 F) and be fully open by the stated temperature (193 F) as well. The other item here (at left) is the thermostat switch for the mixture warning light.