You're looking at a very special item.
This is an original item from the mid-twentieth century. This K&O #107a LARGE electric motor is just what you have been looking for to put in that vintage large boat.
The electric motor unit footprint is 2.75" x 3.5" x 1 3/8". It runs 6-12 volts dc. Nickel plated and gray.
If you collect vintage model or toy boats, this is one of those things you have to grab when you see it. The LARGE motor is highly sought after.
CONDITION: C-6+/C-7. Tested and works. Lots of edgewear, rubs, paint nicks, and oxidation to the the metal.. No box.