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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.

    Porpoise Class Submarine
    Keel Laid 27 October 1933 - Launched 20 June 1935
    Commissioned 15 August 1935 - Decommissioned 15 November 1945

  2. PORPOISE SS-172
    Placed In Service 8 May 1947 as Naval Reserve Training Ship at Houston, TX
    Placed Out of Service 13 August 1956

    Struck from Naval Register 13 August 1956
    Sold 14 May 1957 for scrap

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 incarnation of the ship (ie, for each entry in the "Ship Name and Designation History" section). 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 Porpoise SS-172 Covers Page 1    (1935-1943)
  2. USS Porpoise SS-172 Covers Page 2    (1936 Shakedown Cruise)



This section lists examples of the postmarks used by the ship. There should be a separate set of postmarks for each incarnation of the ship (ie, for each entry in the "Ship Name and Designation History" section). 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
Postmark Image
Thumbnail Link
Cover Image

Post Office Established November 1 1935 - Post Office Disestablished May 12 1945


Locy Type


USCS Postmark
Catalog Illus. CD-2


First Day of Postal Service. Add-on cachet by Alton M (Budd) Arrington


Locy Type
3 (AC-TBB)



R/S marking on back from John C. Von Losberg. This cover has been backdated to reflect the First Day of Postal Service. The ship's Type 3 postmark device was received and first used on November 28 1935 with "THANKSGIVING/DAY" in the killers. (USCS Postmark Catalog)


Locy Type 2z


Censored wartime (WWII) use


Locy Type
3 (AC-TBB)



Thanksgiving Day. Add-on cachet by Alton M (Budd) Arrington


Locy Type 9v




Locy Type SL


Deep Dive, cachet by P.J. (PeeJay) Ickeringill


Other Information

USS PORPOISE earned the Asiatic-Pacific Campaign Medal w/ 5 battle stars and the WWII Victory Medal for her Naval service

NAMESAKE - Any of several small gregarious toothed whales.

The ships sponsor was Miss Eva Croft.



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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