Yashica Electro 35 GS

Got my Yashica Electro yesterday along with a little Rollei flash, can’t wait to get out and take her for a spin. Still waiting for the battery modification I ordered though (they don’t make the batteries for it anymore). Until I get it I can only shoot it at 1/500, but I’ll probably get by using the sunny 16 rule for a roll or two to check it out; it could be good to know if the light seals needs replacing and whatnot, it is from 1970 after all.