An extensive collection of Cachet, Event Day & 1st Day Covers

U.S.A.
1st Flights  -  Air Mail  -  Animals/Wildlife  -  Anniversaries  -  Buildings/Structures  -  Businesses
Centennials  -  Communication  -  Countries  -  Dairy/Cattle Congress  -  Education  -  Entertainment  -  Environment
Events/Historic Events  -  Exhibitions/Conventions  -  Financial  -  Flags  -  Government  -  Holidays
Items/Objects  -  Medical/Red Cross  -  Military  -  Miscellaneous  -  Monuments/Parks/Bridges/Museums
Organizations  -  Philatelic Society  -  Political  -  Post Office Related  -  Presidents  -  Prominent Americans
Religious  -  Science  -  Space  -  Sports  -  Stamp Clubs/Stamp Related  -  State Flags  -  States/Cities
Transportation  -  Vegetation  -  World Fairs



International
Canada  -  Miscellaneous  -  Political  -  Religious  -  United Nations