Minting/Production Error (8)
Object Related Specifically to a Personality or Key Event (1)
Philately - Air Mail (49)
Philately - Besieged locale (1)
Philately - Censored Mail (12)
Philately - Earliest/Latest, First/Last & Proving dates or places (12)
Philately - Hotel & related mail (1)
Philately - Military Post Offices or Military Administration (5)
Philately - Multiple Postal Authority/Period mail (3)
Philately - Official Mail (2)
Philately - Original Postal Document (3)
Philately - Postal Stationary (3)
Philately - Printed Matter mail (7)
Philately - Sea Mail/Paquebot (1)
Philately - Significant Addresses/Persons (3)
Philately - significant cachets & postal markings (27)
Philately - Significant franks on covers (59)
Philately - Significant Rates/Periods (19)
Philately - Significant Route (7)
Philately - Small Locales (21)
Philately - Stampless Mail (3)
Philately - Surface Mail (contemporary) (10)
Philately - Suspended Service mail (5)
Philately - Taxed Mail (2)
Philately - Train Stations/Rail Transport & TPOs (1)
Philately - uncatalogued/undocumented varieties (5)
Philately - Unusual Origin, Destination or Postal Link (8)
Philately - unusual postal procedures/fines/taxes (3)
Unique/Discovery Piece (6)