While at Barber last weekend, I noticed in the swap meet, the corral, the museum, etc. that the tail lights and lenses that were listed for or on a CB500 were different than mine. They were all much bigger.
Then, I ran across a single CB500 in the museum that had a small tail light like mine. I didn't get pics for a direct comparison, but was there a change to the tail light at some point?
My bike has a 1971 VIN, btw.