Twenty dollar bill
From Lostpedia
A Twenty dollar bill was found by Sayid in the wallet on the buried dead man (the real Henry Gale) at the location of The Balloon in "Lockdown". We see this bill in "Dave".
On the bill a note is written from Henry Gale to Jennifer. The writing, along with the driver's license in the wallet and the fact that corpse was a man, proved that Ben's claim of being Henry Gale was false.
Screencaps show the bill to be a US $20 bill, specifically: SERIES 2004 (therefore introduced into circulation on October 9, 2003 [1]), Serial number EF61363822B. This dates the balloon crash to sometime between 9th October 2003 and the finding of the balloon by Sayid on 21st November 2004.
The message in the note reads as follows:
| “ |
Jennifer, | ” |

