Earliest/Latest, First/Last & Proving dates or places (21)
FDC First Day Covers (14)
Object Related Specifically to a Personality or Key Event (10)
Significant Addresses / Persons (9)
Object Related Specifically to a Personality or Key Event (1)
Significant dates (21)
Small locales (16)
Philately - Air Mail (1)
Uncatalogued / Undocumented varieties (3)
Unique / Discovery items (10)
Philately - Censored Mail (1)
Unusual Origin, Destination or Postal Link (11)
Unusual postal procedures, fines or taxes (15)
Philately - Displaced Persons/Internee/POW Camp mail (2)
Philately - Multiple Postal Authority/Period mail (2)
Philately - Original Postal Document (1)
Philately - significant cachets & postal markings (4)
Philately - Significant Route (5)
Philately - Stampless Mail (1)
Philately - Suspended Service mail (3)
Philately - Unusual Origin, Destination or Postal Link (3)
Philately - unusual postal procedures/fines/taxes (1)