Tell me more about this lens

[jackmolotov]

I am looking for more information on one of my lenses, and I cannot find it on the internet through searching.

135mm soligor f2.8. From what I've read soligor was a re-seller, of many different lenses, so I am trying to figure out who made this lens. Its a really sharp lens and really suprised because I got it for $40 bucks on ebay. I just want to know some history behind it,

--Markings:
Front element
SOLIGOR TELE-AUTO 1:2.8 No. 1685647

Markings on the side are the fstops as shown, one in green once in black with 5.6 and 2.8 highlighted.

There is a ridge behind the fstop ring near the mount which has two arrows, pointing opposite towards a red "O" and a green "G".

There is also "made in japan" on the body.

what year is this from and who made this?

 

[KmH]

Soligor - Wikipedia, the free encyclopedia