Rolleiflex was known for the two eyed SLRs from earlier years, but went into the PP SLR business around 1970. Like other West-German brands at the time, they were struggling with the Japanese domination, and moved the production to Singapore to survive.
They took over Voigtländer from the falling Zeiss Ikon in1973, making parallel cameras in two brand names and with two different mounts, the M42 for Rolleiflex and the bayonet-mount for Voigtländer. This was not a cost effective policy as the market
share was mimimal. Besides, some mention that the quality control was not good enough. Others deny this. Anyway, Rollei did not make cameras that were interesting enough to the public, and the brand ended in 1982.
Rolleiflex SLR 35 M42 mount:
35: 1970-74: West-Germany
-SLR 35: 1972-76: Singapore
-SLR 350: 1974-76: West-Germany
-SLR 35 M: 1976-79: Singapore
-SLR 35 ME: 1976-79: Singapore
-SLR 35 E: 1976-81: Singapore
Voigtländer under Rollei control, M42 and
-Ifbaflex: 1974. West-Germany and Singapore. M42. Rebadged VSL 1 for the French market.
-VSL 1 Silver: 1974-76: West-Germany. M42
-VSL 1 Black: 1974-76: Singapore. M42
-VSL 1: 1975-79: Singapore. BM
-VSL 2 Automatic:
1976-79: Singapore. BM
-VSL 3 E: 1977-80: Singapore. BM.
This information is from Jack Dugrew. Google Captain Jack Rollei camera.
In addition to the 35mm SLR and the Rolleiflex
TLR cameras, Rollei also made medium format, the Rollei 66, 35mm compact and even some 110 format cameras.