1979 Architecture Series, GAMM Cachet—Missing Color Misprint

The GAMM cachet features the word 'Architecture' in red cursive script at the top left, with a red silhouette illustration of a classical columned building (appears to be the Virginia Rotunda or similar neoclassical structure) below it. However, the cachet is notably missing its second color — the building illustration appears only in a single flat red tone without the expected detail color, confirming the 'misprint' notation. The cover bears a block of four 15-cent Architecture USA stamps (Scott #1779-1782) depicting the Virginia Rotunda, Baltimore Cathedral, Boston State House, and Philadelphia Exchange, cancelled with a circular machine postmark from Kansas City, MO dated June 4, 1979, with a 'FIRST DAY OF ISSUE' machine slug cancel across the stamps.

This First Day Cover features a red cachet with the word 'Architecture' in a cursive font and an illustration of a neoclassical building in flat red, missing its expected second color. The cover bears a block of four 15-cent Architecture stamps (Scott #1779–1782) depicting American landmarks: the Jefferson Rotunda, Latrobe Cathedral, Bulfinch State House, and Strickland Exchange. The stamps are cancelled with a circular postmark from Kansas City, MO, dated June 4, 1979. The cover is in good condition with minor discoloration.