Hi Offer, Yes, this is a known error. Depending on which catalog you are using, it may or may not be listed (Scott does not list it). Reasonable value of the stamp is around $120. I would classify
RP, That's puzzling. When I think of frameline, I imagine a thin line surrounding the design, which does not exist on the 1973 Jefferson Memorial issue. Even the booklet covers have a solid background
Janella, My expertise is limited to United States stamps only, so I cannot speculate on the resale value of your Grenada issues. I've never heard of the International Collectors Society, but I suspect
This is what is known as a "Changeling". Stamps of original color can become another color under certain conditions. Exposure to sulphur in the air (near plants, mines, etc), can cause orange stamps
Hi Bruce, I'm so sorry for your loss. My older brother passed away 3 years ago and he was my inspiration to start collecting when I was 12 in 1980. The short answer to your question is "maybe".