Help me to identify please !!

[AesirHunter]

I have an ammo box (I think it is spanish because I purchased it in Spain) there are no letters only 3 "YSE" as you can see in the photo.

[douglas2496]

Its very similar to my British ammo tin for 7.62mm machine gun ammunition. This is outside my area of knowledge but this type may well be in use with other NATO countries.

[Stinkpotpete]

Looks like a US .30 cal, for M-60 machine gun ammo. I think they still use it for the M 240 G ammo

[AesirHunter]

Looks like a US .30 cal, for M-60 machine gun ammo. I think they still use it for the M 240 G ammo

And do you know what does "YSE" stand for?