Prisoner of War Mail
A letter or other postal item to or from a prisoner of war, which usually bears some evidence such as
Handstamp
A postmark, overprint, cachet or other such mark applied to a stamp or postal item by hand.
Helicopter Mail
Mail which has been officially carried by helicopter and which bears a cachet or other evidence of this fact.
Parachute Mail
Mail dropped by parachute from passing aircraft on islands or other isolated locations, and usually identifiable by cachet or other
Boxed
Description of a postmark, handstamp or cachet to indicate that it has an outer line around it, usually in the