Quote:
1. clearly the sides are not even but not sure if this was common for the stamp
Great to see a stamp held by tweezers rather than fingers.
Well done you.
Query: Does not Imperf x 11 indicate imperf at top ? not sides.
Opinion:
Early North Korean stamps had very wide margins, I suspect your example has been hand trimmed.
I hope you can prove me wrong, but the attraction to a high catalogue value, have persons willing to deceive.
Good Luck.