i'm not sure on the amount of these produced? where did you get the 76 from?
it from this EBAY add,,,,it says only 76 know to EXIST,,,,not produced,,,, still a GREAT find dude !!!!!!!
"This authentic 1789 'GW in Oval' "Long Live The President" brass button measures about 1 5/16" in diameter and was found April 2008 in Vermont. There is a great website for these buttons (just google George Washington Inaugural Button); Albert has this one listed as #WI-11B, Dewitt lists it as 1789-7, and Cobb has it listed as #5A (GW in Oval with medium spacing--as of 2005 there was only 76 of these buttons known to exist (in all 3 spacing styles) and the medium spacing style is listed as 'scarce') and this one is listed at a value of $3000 (in extra fine condition). The button is in very nice condition for being in the ground for over 200 years; it has some bending, and the lettering is well defined-- it could clean up much better; the original shank on the reverse side is missing. Low starting price with no reserve!! "
good info here: http://mosc95.pld.com/kirk/CobbGW/index.html