Special Characteristics

Philately - Air Mail

Philately - Besieged locale

Philately - Censored Mail

Philately - Postal Stationary

Philately - Sea Mail/Paquebot

Philately - Significant Addresses/Persons

Philately - significant cachets & postal markings

Philately - Significant franks on covers

Philately - Significant Rates/Periods

Philately - Significant Route

Philately - Stampless Mail

Philately - Surface Mail (contemporary)

Philately - Suspended Service mail

Philately - Taxed Mail

Philately - uncatalogued/undocumented varieties

Philately - Unusual Origin, Destination or Postal Link

Philately - unusual postal procedures/fines/taxes

Unique/Discovery Piece

Earliest/Latest, First/Last & Proving dates or places

Small locales

Unique / Discovery items