Type II
Introduced in 1970 and continued to provide support for older Series One and Series Two cameras. The “A” stands for “Automatic”, which stretches as far as allowing the film to be loaded up to a start mark on the film insert and then automatically wound on to the first frame without the need to peek through a port like their predecessors.

Type III
2nd generation “A” film magazines use the same basic gearing as the 1st generation but with improved film transport, an updated film progress mechanism and improved tolerances for the film insert advance mechanism. The rear of the film magazines was updated to remove the ISO reminder and flip-up film reminder slot. Instead, there is a small square slot that users can slide a piece of card/film box flap into.