Pittman electric motors were very popular in the 1960s for model boats. Pittman also made motors for Lionel in the 1940s according to their web site.
I still have one boat I build from scratch, a 36 inch long Coast Guard 95 foot cutter with a Pittman Super Panther motor, Model 9002b, 3-6 vdc, that was powered by a 6 volt lead and sulfuric acid battery. It was build from balsa and I coated the hull with a Sears one sq yard fiber glass boat repair kit. Oyster shell were all over the bottom and shore of the shallow bay we lived on. This boat was built in 1960-2 and was radio controlled w/ tubes and had a 67 volt dry cell battery powering the transmitter and a homemade speed servo. I built the boat from plans in Model Builder magazine that were not very detailed on deck gear. I wrote the Coast Guard and they sent me set of 9in X 36in blue prints and two 8x10 B&W photos!
I also have my deceased brother's tow boat with a Pittman 9002b motor and gearing to power twin screws. He never finished it. He covered its hull with nylon cloth, the kind used for model airplanes. Shown below
My Coast Guard 95 foot cutter with Pittman Panther 9002b motor and radio control, dust and all! It took me 2 years of spare time to finish it in Hi school and a College summer.
Charlie