I found this stamp in my Dad's collection, and was surprized. In looking at a 1972 Scott catalog, this stamp is considered rare. An 8 overprinted on a 30.
I've seen used stamps like this on
ebay for $500, and mint for more.
However, I've also seen the stamp on a dealer's site for only $1.25 (I tried to buy it, but they were sold out.)
Is it truely rare, or is there a similar issue that is not rare? (eg some special watermark or something that differentiates.) It doesn't say enough in the old catalog I have.
Curious to know if I have a nice surprize or just an ordinary stamp.