The Electro series from Yashica were consumer grade range finders. You can find them on ebay. The GSN was the top of the line and the MG-1, 1975. was the bottom. They worked about the same with differences in lenses but with the same control features. Split screen, range marks, aperture setting and extra graphics as hints as to sunny, cloudy, etc. Lots of lights for over and under and arrows flashing in screen to warn you. The only problem today is finding a way to power them up.
I went on ebay and got an imported from china sleeve with a metal base that fits the 4L44 6V battery and proceeded to try it out. The GSN had a problem with the sticky shutter so I loaded up the MG-1. Previously I had used the GSN with a jury rig spring and wire thing that worked somewhat ok. This was a step up solution. It worked fine in the MG-1 but I cooked the film a bit too long as the temp of the D76 was hotter than I had needed it to be.
Yashica Electro series
Moderator: DuncaninFrance