From my research and the label this is likely from the 90's but possibly as early as the 70's Either way it's a rare and awesome find. Even with the bottom cropping it's in excellent shape. Probably from the 90's since it was not made in the US at this point when a lot of knits started moving over to China.
Brand size from then is 15 1/2 which seems to fit a uni M
Condition: Some fraying and fading with age. 6/10
Chest 22" length 28" sleeve 20"