Now what could be rarer, as I have not seen one in the wild or one pass my hands in many years is this Slim lets see who can tell the difference.... BTW this was manufactured in 1968 near the very end of Slim production.Sorry to say but you are confusing early production date codes with later date codes that had design changes. i.e. "crimped" on end caps.. The non-crimped style are not "rare" In 1962, Gillette changed the design of the bottom edge of the positioning bar/door actuator between the H-3 and H-4 manufacturing models. There do exist some H-4 models with the old style positioning bar/door actuator therefore the change was made in the fourth quarter of 1962. View attachment 1021093