1965 Dodge Dart Charger

"RBM" = "Really Badly Made". :lol:
There were lots of suppliers for that switch, which was used for decades under the same part number. What you receive when you buy a NOS item is up to the fates. About all you can do is ask NOS parts suppliers to check the switches they have to see if they come up with an RBM item.

Weatherhead is an old name; here's a pic I snapped at Old Car Parts Northwest last time I was there: