Introduced in 1915 the Neptune rowboat motor was Caille's inexpensive motor...it was not a badge motor. It was available with either battery or magneto ignition.
There was also a canoe version, and a 3 1/2 hp commercial version which I have never seen. They always had a dry exhaust.
Neptunes were sold unpolished as an economy move. So if you have one don't polish it!!!