Hi AB1961,

Again, thank you very much for the guidance. Much appreciated.

Hi AB1961,
Thank you very much! Is it fair to assume that the watermark would be the best guarantee of authenticity or are there other indicators to look for you know of?

Hello - I'm new to the group and recently re-started philately after a 50+ year break. I am in a steep learning mode so hopefully this is the right place to post this question. My current focus is GB 1840-1951, and one of the gaps I have is SG99 (1867 10d red-brown). According to Gibbons this is val...