The pin measures 7/8'' wide. It appears to be in mint unused condition as pictured.
Below here, for reference, is some additional information about the Naval Surface Warfare Center Port Hueneme Division:
Naval Surface Warfare Center Port Hueneme
From Wikipedia, the free encyclopedia
The Naval Surface Warfare Center, Port Hueneme Division (NSWC PHD), is a component of the Naval Sea Systems Command (NAVSEA), is a tenant command located at Naval Base Ventura County in Port Hueneme, California. In addition to its primary location at Port Hueneme, the division operates detachments at White Sands, New Mexico, N.M., Virginia Beach, Virginia. and Louisville, Kentucky.
NSWC PHD was founded in 1963 as the Naval Ship Missile Systems Engineering Station. It was established to provide overall technical support for the new guided missiles, RIM-2 Terrier, RIM-8 Talos and RIM-24 Tartar, that were being introduced into the naval fleet. Port Hueneme was chosen as the site for this operation because of its deep water port, its proximity to the Navy's missile testing range at Point Mugu, California and the availability of space at the already operating Naval Construction Battalion Center Port Hueneme.
Chartered as an In Service Engineering Agent, the newly established organization emphasized onboard assistance to ship crews, analyzed problems and requirements and developed engineering and logistics improvements to the guided missile systems. The command's engineering responsibilities soon expanded beyond missiles, assuming engineering work for many new weapon and combat systems used by the Navy's surface fleet. The workforce also took on the responsibility of providing logistics support referring to the procurement, maintenance and transportation of what the fleet needed including maintenance and repair, training manuals, essential spare parts, tools and test equipment. The command also adopted the program of underway replenishment, which allows ships to receive fuel, ammunition and supplies while at sea.
Today, the command supports new technologies and innovations to sustain a wide variety of weapon, combat and warfare systems. NSWC PHD is focusing its technical capabilities on Next Generation in service engineering, which involves direct connectivity to the fleet on a global basis and the immediate availability of round the clock access to products, services and fleet support capabilities.
NSWC PHD's Technical Capabilities include in service engineering, test and evaluation and integrated logistics support for the following:
Strike Force Interoperability and Theater Warfare Systems
Surface Combat Systems
Surface Warfare Systems
Underway Replenishment Systems (including research & development)
Surface Gun Systems
Surface Missile Systems
Surface Missile Launcher Systems
Directed Energy Systems