Spanish or Portuguese 7.62x51?

[mountain_cowboy]

There's a guy with a 1000 round case of 7.62x51 in a wooden crate with the letters "F.N.P" and "1000 cartouchos de 7.62x51 Espanol" stamped on the side, along with a symbol that looks like a circle with a sword through it and the letters "S,B" inside the circle. Does this sound like Spanish or Portuguese surplus to you guys? I've never heard of Spanish surplus, but the "Espanol" stamp throws me off. The seller doesn't want to bust open the crate to look for a headstamp, so I'm stuck with few clues. Sound familiar to anyone?

 

[Southern Raider]

Spainish surplus is generally from the "Santa Barabra" facility, which explains the "SB".