Bendix 2 speed w. coaster brake? I had one of these around 1963, assembled by LBS into a 26" middleweight, frame unknown. I hated this bike because it felt slow and sluggish, and neither of the gears seemed to be able work with my young legs. I see they are quoted as having ratios of 1:1 and 1:0.67. Mine seemed to hae very long cranks, one-piece ashtabula-style. Frame had curved TTs, so perhaps it was 1950s. A used build from a decent bike shop, I'd not limit the hub to being a 1950s or any other year. We just don't know. Lost track of that bike 50 years ago, but were there any such hubs with different ratios?