Originally Posted by kanzlr
ain't those Yashicas basically Niccas after the take over?
Yep, they're basically Niccas.
The YE was basically a rebranded Nicca 33 and the YF was an update to the Nicca IIIL that Nicca had in the works when Yashica took over.
Nicca wasn't doing well as the SLR's market share began to bite into the RF market. Yashica was in a bind as at the time you couldn't buy an off-the-shelf focal plane shutter the way you could leaf shutters (Copal, Seikosha, ... didn't have them until the early to mid '60s) and Yashica wasn't making any of their own shutters. By acquiring Nicca they acquired a ready-made shutter factory which proved a good compliment to their existing skill set. The two RF models merely finished out the market left for the Nicca models.