I just received these 1976 $2.00 bills with stamps and have been stamped with the US Postal seal. Both are in nice condition.
Stamped April 13, 1976 Vernon, CT Talcottville STA. USA.
Serial numbers are very close in sequential order A 07750638 A - A 07750642 A
Does the dollar value increase with stamped bicentennial bills and how much are they worth?
Pictures are attached.