As Sombreru Pillbox II

S shore of Tumon Beach in Tumon Bay, Tumon, Guam. County/parish: Guam.

Added to the National Register of Historic Places March 04, 1991. NRIS 88001864.

Part of Japanese Coastal Defense Fortifications on Guam TR (NRIS 64000141).

1 contributing structure.

National Park Service documentation: https://catalog.archives.gov/id/131517869