Here is a table that lists the different versions of this lens:
MF Version: Cosina (the original maker of this lens):
- Cosina 100mm 1:3.5 MC Macro (flat rubber with grooves)
Phoenix - Phoenix 100mm 1:3.5 Macro (regular rubber with knobs)
- Phoenix 100mm 1:3.5 Macro (flat rubber with grooves)
Promaster - Promaster Spectrum 7 100mm 1:3.5 MC Macro (flat rubber with grooves)
Soligor - MC Soligor Macro 100mm 1:3.5 (flat rubber with grooves)
Vivitar - Vivitar 100mm 1:3.5 MC Macro (flat rubber with grooves)
- Vivitar 100mm 1:3.5 MC Macro (flat rubber with wider grooves and inscription on front end of the rubber)
AF Version: Cosina (the original maker of this lens):
- Cosina 100mm 1:3.5 MC Macro AF (Version with inscription "Macro" on the barrel)
- Cosina 100mm 1:3.5 MC Macro AF (Version with inscription "AF Macro" on the barrel)
Pentax - smc Pentax-FA 1:3.5 100mm -Macro-
Phoenix- Phoenix 100mm 1:3.5 Macro AF
Promaster - Promaster Spectrum 7 100mm 1:3.5 MC Macro
Soligor - MC Soligor AF Macro 100mm 1:3.5
Tokina Vivitar - Vivitar 100mm 1:3.5 MC Auto Focus Macro
Voigtländer - Voigtländer Macro-Dynar 100mm 1:3.5 VMV
A few comments:
Over the years Pentax had several budget lenses that were said not to be made in the Asahi factories but by Cosina or even Samyang.
A real surprise for me was the Tokina labeled version - one 3rd party lens maker rebadging another 3rd party lens maker's lens.