Optical design is similar to the MC-I/II/X versions of 135/2.8 and also
STF 135mmF/2.8[T4.5] without its apodization element, probably for
Minolta this optical design is one of successful ones I guess.
See > http://artaphot.ch/minolta-sr/objektive/164-minolta-100mm-f2

This lens is almost fifty years old, so its helicoid grease is dried up and
infinity focus is a tad short, but I cleaned the helicoids and made it to
reach infinity focus? It now has smooth focusing like a brand new lens.