spanish 75mm ID

[fert]

Hello,
anyone could help me to identify this 75mm please? I think this is a blank case, due to the groove.
headstamp: ARSENAL PRINCIPAL DE GUERRA 1902
75x100 R90mm

thanks in advance
best regards

 

[Hoeksel]

I know these measurements as a German MAN (Manover) shell case dated 1898.

 

[pajarito]

I think maybe it's Argentine.

 

[bdgreen]

Pajarito is probably correct.

Arsenal Principal de Guerra, Buenos Aires, Argentina.

Here is a reference to the production of small arms ammunition at this facility:
http://iaaforum.org/forum3/viewtopic.php?f=8&t=12835&hilit=PRINCIPAL