electric was an xtra cost option on trucks until 60, most 55-59's have vacuum, not sure about cars, but I think the same [I've seen 57 cars w/ vacuum wipers] - after they started with electric washer setups electric wipers were standard
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics