The photo Corsairdeluxe posted is correct. I did take some pix of mine when restoring one a few years ago.
Here's the one I restored for my '53. It has a repro cable on it from Bob McBride and a repro knob from Rudy Phillips. This is what the original looks like.
And in the car
The lighter itself is a Casco-B'P'T which you can sometimes find on ebay. Rudy has the knobs and it's usually pretty easy just to replace the knob.