Back to which 1950 do you have?
The early 1950 would match the grill and front clip of my brother's truck:
If it's the late 1950, it should match the grill and front clip of my 1950 truck:
If it's the early model, that switch is close to the original, but the knob isn't "factory correct" (if that matters to you). If it's the late model, then it's the wrong switch and should be:
http://www.kaiserwillys.com/product...l-headlight-dimmer-switches-parts-accessories
Kaiser Willys has incorrectly identified when the headlight switch changed - the 'dimmer' was used in 1950. The late 1950 model switch has built-in switch for lights for the gauges complete with a dimming capability for those lights. The 'factory' switch for the early 1950 would look like:
As for the switch that you do have, are there letters stamped in the brown board by the wiring connections? If there are, knowing what they're labeled might help in identifying the wiring. If not, Kaiser Willys should be able to tell you what goes where (would've thought they would have included wiring information since it's not an exact match to the factory switch).
By the way, I checked Walck's site and he has the light switches listed under their proper years (and he's a bit less expensive as well...)
