Ashbrook Electric Co.
|While I think this must be a Jewel, badged by this well established electrical company to make the most of the new detachable motor "fad". It's included here because the article in the 1915 Rudder issue which named the major brands of the time listed it.
Ashbrook Electric Co. made storage batteries and accessories for marine use. They sold the Jewel in 1915, by the way...and the photo here is the same as that ad.
My research so far is limited primarily to online sources so they may have advertised much more in a series of magazines that are not available to me. Note this ad is from 1918 and the Rudder listed the company in 1915.
Below is a 1915 ad before they badged the Jewel...
|Text of the above 1918 ad reads:
Ashbrook Marine Specialties