
The 12 inch HC Projectile Mk 21 is merely a redesignation of the Mk 16.
The Base Fuze Mk 39 replaces the original "green stripe" Base Fuze Mk 28; the Auxiliary Detonating Fuze Mk 35 replaces the original special "green stripe" Mk 17 Mod 8. These fuzes are now being replaced by the Base Fuze Mk 48 and the Auxiliary Detonating Fuze Mk 55.
The Nose Fuze Mk 62 is the preferred nose time fuze.
No information about functioning.
Nothing else to see.
OP 1664, Volume 1 - US Explosive Ordnance (1947)