[A.T. RockDriller]

Mark...
This is one of the best educational threads on the board...

Thanks for informing us.
I've got four or five complete assemblies in various states of condition.

Now you've got me headed for the shed to check them out.
The latest addition came off of a '64 service truck....and I think it's correct for the year.....I might be reconditioning it and puting it to use.
One of the ones I've collected over the years is a "top" mount....also a fairly complete lamp.
I'll snap a pic or two an post them for your comments when I get a minute.