The lens/bulb Don b has referred to is 8N-15514. The Implement Lamp kit for 48/52 was 8N-18275 changed sometime to FAA-18275-A. This is in the 1939/53 parts catalog. Did not the light mount the same on the NAA as the 8N? I didn't think the mounting changed until 1958 when the light bracket went south. Tough to track these, as Implement Lights were never factor installed.

I just had a thought (it's ok, no smoke) implement lights where an extra or dealer add-on, with this in mind would it be better to research the light maker not the tractor history? They couldn't have had to many lights available in the late '40s and '50s.