Model a overdrive help

we have a 30 roadster with a overdrive in it.I need to try to find info on it.who makes them?or where i can find info on it?Below are some pics thanks for you Help

 

Check over on the FORD BARN but what you've got is someones 'homade' kit that puts a Borg Warner OD from a 3speed in the mioddle of the TT. THe BW number will probably be cast in the side like R-10 or somthing.

The original OD came on lots of cars and truck in the 50's I got all mine from 2wd Jeeps, and Studebakers.

Jeff