My girl friend gave me her dads Zeiss Super Ikonta IV. It looks new. I think the shutter is stuck. The cocking lever is locked. I loaded 120 film in it and advanced it to the first exposure and the lever won't move. Should I take in for service? If so, is there a place in the San Francisco area? I'm sure I don't know what I'm doing. I have used mechanical shutters before because I'm a seasoned view camera user. But there's always something to learn