What Is The Rarest Stamp That You Have Ever Found?

I've found a few over the years, some with decent catalog value and some that are just rare... An unused US postage due I bought in a larger lot was J59 MNH plate single. Another due lot, this one from ebay, included the 1865 10 para essay from Turkey. Finally one of the initial collections I bought to start my Romania collection included a rare paper variety of the 1918 overprint, apparently a dealer talked someone at the postal service into overprinting a few sheets for him and there was one sheet done with my perf/paper combo, so only 100 made.

Here's the Turkey:

Lot's of great finds everyone!

How could I forget about a find I did some years ago, which was the subject of this thread https://goscf.com/t/44954&whichpage=1

It's is most probably a Z-grill, sc 85B. Very sadly the good Mr. Weiss had ended his services when I was about to send my stamp to him. His tragic passing was almost like a token for me, it gave me perspective about how insignificant stamps and grill variations are in life. So in my wisdom I opted to keep the stamp uncertified, as this task was planned for Bill.

Well, back to the question in the OP, tough my stamp is still uncertified, I regard this as the best find I have made. Luckily for me not too many in Norway are into grills - the stamp was found in a cheap ragtime collection that did not pay attention to grills at all

US Scott No. 544d


-IBFS

My once in a lifetime find....Scott US 423B – Found unidentified in collection from Europe. Only 35 known, 2013 catalog value $24,000.
Don

A Graf Zeppelin flown 30c Colombian. One of a kind.

Don - WOW, what a spectacular find - you must have had about the same feeling as Gollum did:




"My precious!"

Behold! The discovery example of Tanzania Scott J1d.




It's priceless!



Cheers, Robert

I've found a few Scott 78cs, 24c US Blackish Violet although I am personally not convinced that this stamp is anywhere near as rare as some people think.

What I did luck into is a 24c Grey Lilac on cover to Italy from 1867; the extremely rare Bremen-Hamburg mail rate that was in use for roughly 10 months.

IBFS - 544d?????? Not in my catalog.