Both Auburn and Franklin used those Columbia two speeds. I an a Auburn guy, I can see the spring purches are missing on the axel housing. I do not know how Franklin mounted the axel to the rear springs.
The distince of the mounting holes center to center is: 1 1/4 inches
The total hight is: 5 inches.
The distance across the lens is 2 7/8.
Hope this helps.
I have a 2020 Infinity. I hate the map feature. The names assigned of hiways have changed the program needs to be updated. I like Google Maps on my cell. The Google lady knows of which she speaks. She also warns of radar ahead. Nice feature.
Keep it 6 volts . Many times the brush grounding in the starter motor is poor. If they ground to the end plate, ground them to the starter frame.
This has been an excelant fix for slow turning 1930's Auburns.
Clearly a 1956 Austin Healy 100-4 . I was at the beach one time, when it was time to go, there are a chick sitting in it waiting for a ride. Sorry no pictures all were burned up in a house fire.
It was painted 67 Mustang lime frost.