Hassasin
Member
So far I've not be able to figure this out. The switch over year from old C style film magazines, to A versions with flip-out crank. I can figure when a magazine was made, but then there are a number of 500C bodies with A style backs and want to know the break year point to narrow down search.
Every product catalog I have starts in mid 70's, not very useful for this.
Every product catalog I have starts in mid 70's, not very useful for this.