[Coronal]

Her battle ensign was saved and brought back to the States. It’s currently on display at the University of Washington.

https://www.history.navy.mil/our-collections/artifacts/ship-and-shore/Flags/NationalFlags/uss-samuel-b-roberts—de-413—ensign-from-leyte-gulf.html

[Steely Tom]

Wow, the nomenclature across the ensign's header says:

U.S. ENSIGN NO 11 MARE ISLAND MAY 1942.

The "NO 11" is a size code, approximately two feet by four.

Mare Island Naval Shipyard is near San Francisco. Sammy B never visited that shipyard, so the ensign must have been issued from stores maintained at that location.