by mamiya, same as Mamiya 14mm and Voigtländer 14mm, but
with HFT multicoating. Maybe avaliable in chrome too?
Here they are all four. Please notice the nice solution for
the filter selection, recessed in the sunshade collar. In that
period Rollei just bought Voigtländer, that was in financial
trouble, and started a foolish marketing of rebranding the same
things. Such as for the Rollei XS35 and the Voigtlander VF135,
nice compact rangefinder cameras, or the same 35mm single lens
reflex, offered in the Rollei or Voigtländer name. You'd
say, fortunately they share the same bayonet. Not really true.
First one Voigtlaender had also an M42 version. Second the Rollei
QBM passed at least 3 different revisions. Lenses were sold
in 3 brands (!!) One was the upper line, the fantastic Zeiss,
with the Rollei HFT multicoating. Then the first Zeiss lens
seria has also a (rare) M42 subserie, as the first Solor-Skoparex.
In many people opinion the best lenses ever made for the 35mm
format, very expensive in the period. The other two lines were
Rolleinar and Color-Skoparex. Quite all these lenses were manufactured
by 3rd party, and the 3rd party was Mamiya.