This is a Humminbird Transducer. It is also old and I would appreciate some help on identifying it. It is 4.25" long, 3" wide, and almost 1.25" thick.
It has a 7 pin female round connector, and absolutely no markings on the cable or transducer. The female connector interior is approx. 1/2" across.
Here are some photos that I hope will help.
I appreciate your input