maybe you can help. I have a beautiful Petri color 35E...near mint. Don';t even remember where I bought it but want to shoot with it. I love the size. It is fully automatic though...30th second f22 without battery which is useless to me...anyhow, it uses a 675 battery. I have tried 675 air which fit nicely and 1.4 volts but meter not working. any ideas? thanks