Hi folks,
I have taken an interest in stamp collecting after finding an interesting box of stamps in a charity shop. It is a very involved hobby but I am enjoying the thrill of looking for rarities.
Speaking of which, I came across a few Machins with flaws. Has anybody any thoughts on them? I am assuming the flaws are due to some form of contamination on the rollers at that points. I would love to know what you think of them.
I'm looking forward to learning a lot from the community here.

