Just a bit of paper - or is it ?

Back from the City, and just made it as the fog had just cleared and the plane was able to land - thank goodness, I just don't like being stuck overnight in an airport hotel room - and from what I hear, they have increased in price three fold, due to the London Olympics.

Despite being a little stressful, I do have an interesting job, and this pit of paper crossed my desk today (I am not a philatelist by the way).

Description.
1840 1d Black Pl.2 Exceptionally fine and fresh unused four margin example lettered FH.

This is one of the famous Penny Black stamps - current price about £8,000.00 ish, give or take.

Needless to say, there was no coffee or tea on my desk at the time.