1927 10 c. Gray-Violet Issue 1927: 10 c. grey violet, postal
history study on exhibit pages, with eighteen covers and cards,
including a
1927 10 c. Gray-Violet Issue 1927: 10 c. grey violet, postal
history study on exhibit pages, with eighteen covers and cards,
including a first day cover, examples carried on Graf Zeppelin
Round-the-World and South America flights, United States - Canada
Special Delivery reciprocal agreement mail, the outgoing to Canada
a registered advertising cover, foreign origins including British
Guiana, Gibraltar, Canal Zone, and Trinidad & Tobago, with foreign
destinations including London, (2, one redirected back to the
United States), World War II patriotic and soldier's mail, postage
dues, auxiliary markings, etc, a diverse holding with many scarcer
covers, fine