MSO 487

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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.

    AM-478 Class Fleet Minesweeper
    Keel Laid 18 August 1953 as AM-487 - Launched 1 April 1954
    Reclassified by US Navy as Ocean Minesweeper (MSO) 7 February 1955
    Completed 3 October 1955

  1. NRP CORVO M 418
    Transferred to Portugal 23 November 1955
    Decommissioned 2 April 1973

    Scrapped at Santander, Spain
Corvo Flag Crest.jpg

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. Covers Page 1     (1956)



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
Postmark Image
Thumbnail Link
Cover Image


Locy Type 2r

USS Neosho


GregCiesielski NRP Corvo 19560205 1 Marking.jpg
GregCiesielski Neosho AO143 19560205 1 Front.jpg

Welcome to Norfolk, cachet by Tazewell G. Nicholson


Other Information

The ships sponsor was Mrs. A. S. Von Wening.



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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