Originally posted by jimH I don't know where they're coming from because every film camera that I've ever had reset the picture count to zero as soon as I opened the film door or released the door latch. ?????? I think the sellers is trying to pull your leg and rip you off. Another "eek bay horror story, I'm afraid.
Its true that most film SLRs reset the film counter to zero when the rear door was opened. However, I would reiterate that Pentax cameras before about 1962 did not do so.
I have a Honeywell Pentax H1a (identical to the Asahi S1a), introduced in 1960, which does not have auto-reset. I also have a Honeywell Pentax H3v (Asahi SV), introduced in 1962, that DOES have auto-reset.
I have two Spotmatics, one Honeywell, one Asahi. Both reset the counter when the film door is opened, not when the rewind crank is pulled up. Just as an experiment, I held the door shut while pulling the rewind crank up. It did not reset. When I released the door and allowed it to pop open a bit, the film counter went to zero. There is a tiny tab on the edge of the film door that fits into a slot in the light-tight channel in the camera body. When this pin is pulled out of the slot in the body, the counter resets.
It would sure be nice to know what camera the OP is talking about. He very probably has one that does reset the counter, but we can't know for sure. Lots of pre-1962 cameras are bought/sold on eBay. The OP hasn't even said for sure that its a Pentax.