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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.

    Admiral W.S. Benson Class Transport
    Keel Laid February 21 1944 as Maritime Commission type (P2-SE2-R1) hull
    Launched July 27 1944

    Commissioned January 31 1945 - Decommissioned May 26 1946
    Assigned to U.S. Army Transportation Service

    Commissioned 1946

    Struck from Naval Register June 9 1946
    Reacquired by U.S. Navy March 1 1950
    Assigned to Military Sea Transportation Service (MSTS)

    Placed In Service March 1 1950
    Placed in Inactive Status February 16 1957
    Placed Out of Service June 5 1958
    Laid up in National Defense Reserve Fleet, Jones Point
    Placed In Service August 14 1965
    Deactivated 1968
    Laid up April 16 1970 in National Defense Reserve Fleet, James River Group

    Struck from Naval Register January 15 1981
    Transferred to MARAD December 23 1994 for disposal
    Scrapped January 4 2005

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 ADMIRAL H. T. MAYO Covers Page 1     (1946)
  2. USNS GENERAL NELSON M. WALKER Covers Page 1     (1953)



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

Date From
Date To
Thumbnail Link To
Postmark Image
Thumbnail Link To
Cover Image

Post Office Established March 20 1945 - Disestablished May 22 1946


Locy Type

(Br. #15744)




Locy Type
2# + Slb(n)




Other Information


Awards, Citations and Campaign Ribbons...
American Campaign Medal - Europe-Africa-Middle East Campaign Medal - Asiatic-Pacific Campaign Medal - World War II Victory Medal

NAMESAKE - Henry Thomas Mayo (December 8 1856 - February 23 1937)
Upon graduation from the Naval Academy in 1876 he experienced a variety of naval duties including coastal survey. During the Spanish-American War he served in Bennington off the west coast of North America. Appointed Rear Admiral in 1913, he commanded the naval squadron involved in the Tampico incident of April 9 1914. His demands for vindication of national honor further accentuated the tense relations with Mexico. Promoted to Vice Admiral in June 1915, as the new Commander in Chief, Atlantic Fleet, he received the rank of Admiral June 19 1916. For his organization and support of the wartime U.S. Naval Forces both in American and European waters, he was awarded the Distinguished Service Medal and various foreign decorations. He evidenced foresight in urging the postwar development of fleet aviation. Admiral Mayo retired February 28 1921 and for 4 years served as Governor of the Philadelphia Naval Home. He retained his commission as an Admiral by a 1930 Act of Congress. He died at Portsmouth, N.H., February 23 1937


Earned 3 Battle Stars (Korea)
* Korean Defense Summer-Fall 1952
May to November 1952
* Third Korean Winter
February to March 1953
* Korean Summer-Fall 1953
May to June 1953

Earned 3 Battle Stars (Vietnam)
* Vietnamese Counteroffensive
* Vietnamese Counteroffensive - Phase II
* Vietnamese Counteroffensive - Phase III

Awards, Citations and Campaign Ribbons...
National Defense Service Medal (2) - Korean Service Medal (3) - Vietnam Service Medal (3) - United Nations Service Medal - Republic of Vietnam Campaign Medal - Republic of Korea War Service Medal

NAMESAKE - Brigadier General Nelson M. Walker (1891-1944)
Walker was killed in action at Normandy on July 10 1944



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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