PT 4

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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.

    58' Experimental Motor Torpedo Boat
    Laid down August 5 1939 - Launched April 19 1940
    Completed June 20 1940

  1. PT-4
    Placed In Service June 20 1940
    Nicknamed "GET IN STEP" and "OLD FAITHFUL"

  2. HM MTB-274 (British Naval Service)
    Transferred to the Royal Navy March 11 1941
    Transfer canceled April 19 1941

  3. RCAF OSO YOOS M-414 (Canadian Air Force Service)
    Operated as High-speed Rescue Launch
    Returned to U.S. Navy custody June 14 1945
    Transferred to War Shipping Administration October 1946

    Fate unknown

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. PT-4 Covers Page 1     (1941)



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


Locy Type
3 (A-BBT)


USS Reina Mercedes


JonBurdett pt4 19410407.jpg




Other Information

Assigned to Motor Torpedo Boat Squadron ONE (PTRon 1). PTRon 1 was the first squadron commissioned, and originally was made up of experimental boats



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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