it's entirely possible it's had 60 years of arcing before eroding enough to 'fail', but those switches are available, and it's frequently possible to just turn the contact over and have it continue to work fine .... maybe you're just late to finding this site for info about these old rigs wink

Bill

Moved over to the Passing Lane

"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