US Projectile, 3 inch AA, Mk 23 Mod 1, 2, 3
These projectiles are similar in construction to HC projectiles, except that a nose time or VT fuze is always assembled. It can be used for antiaircraft fire or, with the time fuze set on safe, used for bombardment.
The overall color of these projectiles is green.
Nothing else to see.
Collaborative Ordnance Data Repository