I got this with some T parts I bought. I don't know much about the later models and it's hard to tell from pictures.
Looks like one. Any Ford script on top or back?
It will be if you put it on the back of a Model T!
So many companies made these. I can't tell the Ford ones unless they have the script. Hopefully someone will have a good clue.
Not like any of our Canadian sourced taillights. The mounting bolt is not held in place with those square upsets. Rather, there are two triangular tags punched in the back of the lamp body, and these are bent over the head of the bolt to retain it. This leaves the bolt loose in the housing.
Yours does not have the two dimples in the back which orient the lamp in the mounting bracket.
The globe holder in our genuine lamps does not have the long slot as in yours, just the L shaped slots for the lugs on the globes.
None of these details can be seen when the lamp is installed, so your lamp would be a good user until a correct one is found.
Hope this helps.
Allan from down under.