What kind of 7.62 ammo do I have?

[JHC-II]

Cracked open a can and low and behold found a bunch of boxes from Century.

What is it Headstamp ZV 7.62 70. Want to run this through a Spanish Mauser is it going to have to much jam? Corrosive value.

Happy Canada Day

 

[CanAm]

Czech Corrosive

 

[sunray]

Sellier & Bellot, Prague, Czechoslovakia. Made in 1970. Whether it will bother your rifle depends on which one you have. 'Spanish Mauser' covers a lot of rifles. They came in several calibres. 7mm, 8mm and 7.62 Cetme as well as 7.62NATO.
If yours is an FR8 you're fine. However, if it looks like any other Mauser, you want to be sure it is chambered in .308/7.62NATO. It should be stamped '7.62NATO'.
There's also a Spanish Mauser FR7 that uses 7.62 CETME. A reduced power 7.62 and should not be fired with 7.62NATO.