A Heathkit (the copper colored one).
I found quite a few firsts with it, including my first diamond ring. I used it for 2 years(peddling around with it on my bike). Got my car in '75, and used it that summer at some old parks(first barbers and indians). Couldn't use it on the local beaches, so in Feb. of '76 I visited a local dealer and after seeing all the finds he was making, I bought a 2D..........And the rest ....as they say.....is history.