I thought that these were long gone, but I found them under a tarp next to the shed. The good- they seem to still roll smooth. The bad- the blue paint on the frame is oxidised and the aluminum has that pithy oxidation, the allen hardware has a thin layer of rust. With some rubbing compound and simichrome, they should look just fine- if you worry about such details. The belt is long gone too.
These rollers are from the late 70s and I think they were also sold by Palo Alto Bike Shop under their label. They are or were quiet- much quieter than my Cinellis. I would like to get $50.00 for them and would prefer local pick up, but who knows....
US of A