P S could be one of four different makers, to id it further we need to know the length of the cartridge, and the inside diameter of the neck. I'm guessing it might be 7x57 for the Spanish Mauser.
[TABLE="align: center"]
[TR]
[TD] Giulio Fiocchi S.p.A., Lecco, Italy
[/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD]Pirotecnia Militar de Sevilla, Sevilla, Spain[/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD]Poongsan Metal Manufacturing Company Ltd., Seoul, Republic of Korea (probably at the Angang Ammunition Plant)[/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD]Povázské Strojárne, Povázská Bystrica, Czechoslovakia (now Slovakia)[/TD]
[/TR]
[/TABLE]