For my it is a pair of 120 bakelite cameras. So simple onless the shutter spring breaks they will go on forever. Also, have recently oicked up a Ashahi S1a that I think will last forever. If it has leasted this long and the shutter speeds still seem right on, I suspect it will outlast me. Same with my Leica CL except for maybe the meter though,my meter is spot on. I do not the same faith in my Bronica with the electrics though historically they seem to all but never breakdown. Leaf shutter cameras don't make it. Almost everyone of them eventually need shutter work.