I was "gifted" a Birth Year (J4) Super Speed w/case, but one side of the lift arm is missing so there's nothing to hold the doors on. Other than that, the razor is in very good condition, so I'm looking for a ‘60s I-L lift arm/bar is missing the crimped-on end cap that holds the doors on. I really just need the T-bar part, but open to a broken or complete razor to buy or trade if you're looking for something in particular.
It seems that in ~1962 Gillette changed the design of the Super Speed arm/T-bar from a single piece with soldered end caps, to a single formed piece (where the doors are attached) crimped to the top of the lift arm/T-bar. I have installed a '62 lift arm and doors on it right now so it's usable, but it's a Frankenrazor as the doors on the earlier Super Speeds are taller so the '64 lower profile doors on the '62 lift arm sit lower than the T-bar. I'm not sure if Gillette changed the Super Speed mechanicals much past the re-design in '62 but date codes from I-L should be a safe bet.
It seems that in ~1962 Gillette changed the design of the Super Speed arm/T-bar from a single piece with soldered end caps, to a single formed piece (where the doors are attached) crimped to the top of the lift arm/T-bar. I have installed a '62 lift arm and doors on it right now so it's usable, but it's a Frankenrazor as the doors on the earlier Super Speeds are taller so the '64 lower profile doors on the '62 lift arm sit lower than the T-bar. I'm not sure if Gillette changed the Super Speed mechanicals much past the re-design in '62 but date codes from I-L should be a safe bet.