Yashica Electro 35 GSN is a coupled-rangefinder that's actually well-built.
Battery Adapter for Yashica Electro 35 from a Syringe - YouTube
Yashica Electro 35 battery adapter by apopticon | Download free STL model | Printables.com
HELP! My Yashica Electro 35 GSN check battery light won't turn on. I've replaced that battery with the right adapter and battery, could it be a issue that the previous battery inside