I collect Frank Herget covers. Who is Frank Herget? He is a sometime cachet maker and servicer from about 1928 to 1952. Among my collection of Herget covers are first-flight or aviation related events. Recently, I decided to re-order the covers in chronological order, and discovered a most interesting cover to commemorate “National Post Office Day” on its 137th Anniversary of July 25, 1932. Note the air-mail slogan cancel.
It was only later that I noticed the interesting back stamp from the Society of Philatelic Americans convention taking place on that same day. My curiosity was also aroused because of the stamp (Scott 720b: George Washington booklet pane of 6). Most Herget first-flight covers were on airmail envelopes or envelopes with air mail stamps, which caused me to do a bit of research. It turns out the stamp on the cover had its first day at the SPA convention that day. Other Washington stamps were issued that same year in sheet format and two coils.
