The brand name Polar is a bit of a mystery to me.
Nowadays it is being used as one of the many brands of the contemporary Samyang lens line. At least i know that the Samyang 85mm 1.4 exists with a "Polar" label on.
Presumably in the 80ies Polar seems to have been a store or sales brand for "cheapo" OEM lenses from the likes of early Samyang. I assume that it must have been particularly popular in Italy or even a brand by an Italian distributor. I know of the following list of lenses available in K-mount:
- Polar Automatic MC 1:2.8 f=28mm (K)
- Polar Automatic MC 1:2.8 f=28mm (KAR)
- Polar Automatic MC 1:2.8 f=28mm [with Macro function] (K) [most likely Samyang]
- Polar Automatic MC 1:2.8 f=28mm [with Macro function] (KAR) [most likely Samyang]
- Auto Polar MC 1:2.8 f=135mm [looks like Samyang]
- Polar MC 135mm Macro 1:2.8
- Polar MC Auto Zoom 1:4.0-4.5 f=18-28mm (KAR) [Samyang - it also exists as Beroflex, Cambron, Centon, Exakta, Goko, Maginon, Panagor, Phoenix/Samyang, Sakar, Samyang, Sears, Sirius, Tokura]
- Polar MC Auto Zoom 1:3.5-4.5 f=28-70mm (KAR) [2 different variants]
- Polar MC Auto Zoom 1:3.5-4.5 f=28-85mm (KAR)
- Polar MC Auto Zoom 1:4-5,6 28-200mm (KAR) [3 different variants]
- Polar MC Auto Zoom 1:4.0-5.6 f=60-300mm
- Polar MC Auto Zoom 1:3.9 f=70-210mm
- Polar MC Auto Zoom 1:4.0 f=70-210mm (KAR)
- Polar MC Auto Zoom 1:4.0-5.6 f=70-210mm (KAR) [2 different variants]
- Polar MC Auto Zoom 1:3.9 f=80-200mm [2 different variants]
- Auto Zoom Polar MC 1:4.5 f=80-200mm
- Polar MC Auto Zoom 1:4.5 f=80-200mm
Now I would be very curious to see photos of your lenses....