Air mail

GPTKB entity

Statements (18)
Predicate Object
gptkbp:instanceOf gptkb:post_office
gptkbp:beganIn early 20th century
gptkbp:declined_due_to improved surface transport
integration with regular mail services
gptkbp:deliveredBy mail by air
gptkbp:faster_than surface mail
gptkbp:first_official_service gptkb:United_Kingdom
gptkbp:first_regular_service 1911
gptkbp:first_US_service 1918
https://www.w3.org/2000/01/rdf-schema#label Air mail
gptkbp:marking special stamps
blue labels
gptkbp:replacedBy regular airmail in most countries
gptkbp:usedFor international mail
domestic mail
gptkbp:uses gptkb:aircraft
gptkbp:bfsParent gptkb:Railway_Post_Wagon
gptkbp:bfsLayer 6