S-21 SS 126

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Ship Name and Designation History

This section lists the names and designations that the ship had during its lifetime. The list is in chronological order.

    S-18 Class Submarine (Holland-type)
    Keel Laid 19 December 1918 - Launched 18 June 1920

  1. USS S-21 SS-126
    Commissioned 24 August 1921 - Decommissioned 31 March 1922
    Recommissioned 14 September 1923 - Decommissioned 1 June 1939
    Recommissioned 1 September 1940 - Decommissioned 14 September 1942

  2. HMS P-553
    Transferred to Great Britain 14 September 1942 and redesignated
    Returned to U.S. Navy 11 July 1944

    Sunk as target 23 March 1945 off northern New England

Naval Covers

This section lists active links to the pages displaying covers associated with the ship. There should be a separate set of pages for each name of the ship (for example, Bushnell AG-32 / Sumner AGS-5 are different names for the same ship so there should be one set of pages for Bushnell and one set for Sumner). Covers should be presented in chronological order (or as best as can be determined).

Since a ship may have many covers, they may be split among many pages so it doesn't take forever for the pages to load. Each page link should be accompanied by a date range for covers on that page.

  1. USS S-21 SS-126 Covers Page 1     (1930-41)



This section lists examples of the postmarks used by the ship. There should be a separate set of postmarks for each name and/or commissioning period. Within each set, the postmarks should be listed in order of their classification type. If more than one postmark has the same classification, then they should be further sorted by date of earliest known usage.

A postmark should not be included unless accompanied by a close-up image and/or an image of a cover showing that postmark. Date ranges MUST be based ONLY ON COVERS IN THE MUSEUM and are expected to change as more covers are added.
>>> If you have a better example for any of the postmarks, please feel free to replace the existing example.


Postmark Type
Killer Bar Text

Thumbnail Link To
Postmark Image
Thumbnail Link To
Cover Image

2nd Commissioning 14 September 1923 to 1 June 1939

Post Office Established 10 March 1925 - Post Office Closed 1 December 1928

Locy Type 3 (A)


From the Paul Huber collection.


Locy Type


From the Paul Huber collection.


Locy Type


Cachet by George V. Sadworth, sponsored by Robert J. Parry. From the Paul Huber collection.


Locy Type SLts


From the Paul Huber collection.


Other Information

The ships sponsor was Mrs. Thomas Baxter.



If you have images or information to add to this page, then either contact the Curator or edit this page yourself and add it. See Editing Ship Pages for detailed information on editing this page.


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