RR,
They were made in LaCoruna, one of the locations of the Empresa Nacional Santa Barbara de Industrias Militares S.A.. Santa Barbara was the the nickname given to these actions.
Both what we call "Santa Barbara Mausers" and the PH Safari are copies of the FN Supreme Mauser and are, except for the triggers, identical.
P-H started using the SB actions somewhere in 1965. Prior to that (so, from about 1962 to 1965), it was FN actions. They were made in barrel lengths of 22 inches barrel (OAL 43 inches), 24 inches barrel (OAL 44.5 inches) 25 inches (OAL 26 inches Magnums) and 26 inches barrels (Target rifles). Early 1200 Safari Super Magnums had 22 inches barrels. The model with the angled fore end nose cap was the 1200 (Safari).