Canal Zone "Paquebot" postmarks

I quote:
[quote]

Items delivered on ships with ship's mail or sea mail are to be franked on the high seas with stamps of the ship's home country, after reaching the territorial waters or in the port of another country in accordance with the tariff valid there with the stamps of that country. If, for any reason, the stamps are not cancelled on board, they will be cancelled by the post office at the port of delivery. carried out. In any case ( exceptions exist!), a stamp PAQUEBOT is affixed to all mail coming from ships, which is often required as proof of the proper postage with other national stamps and prevents unjustified Imposition of a surcharge prevented.

[End quote]

From "Großes Lexikon der Philatelie", Ullrich Häger, Volume II.

I show here only covers with PAQUEBOT cancels of the Canal Zone and with American stamps. Also only the postmarks with the name of the post office.There are actually only two of these: Cristobal from the northern end (Atlantic), and Balboa from the southern end (Pacific) of the canal. There are a few "variations" with additions to the name of the post office.

Source references:

L. P. Entwistle, "The Postal Markings of the Canal Zone", Second edition
Ullrich Häger, "Großes Lexikon der Philatelie", Volume II


Reverse side of the next image showing a cut through the Canal Zone.
Paquebot postmark P-1 to Entwistle with place "Balboa" and a 1 in the killer. Postmarked April 21, 1930 (see text on card).
This is an exception as the card was franked with Panama stamps. But I found the back (previous picture) so interesting.
Paquebot postmark P-2 to Entwistle with place "Cristobal" and a 1 in killer. Cancelled on 04 October 1947.
Paquebot postmark P-2 to Entwistle with place "Cristobal" and a 3 in killer. Cancelled on 17 April 1950.
Paquebot postmark P-4 to Entwistle with place "Balboa". Cancelled on 04 July 1951.
Paquebot-Stempel P-4a nach Entwistle mit Ort "Cristobal". Gestempelt am 17. August 1962 und Nachgebühr von 2 US-Cent.
Paquebot postmark P-5 to Entwistle with place "Balboa". Cancelled on 02 October 1955.
Paquebot postmark P-6 to Entwistle with place "Balboa". Cancelled on 12 July 1966.
Paquebot postmark P-7 to Entwistle with place "Cristobal" and a 1 in killer. Cancelled on 16 December 1969.
Copyright Jürgen Kuseler 2021