Trying to identify. Not much to go on.

[vintage hunter]

The oval gas escape port suggests it's a Spanish Model 1916 short rifle or carbine action. Many 1916's were later re-barreled for the 7.62 Cetme round and used by the Spanish Civil Guard, another variant was the FR-7 trainer. Both were very common in the U.S. 20 or so years ago and the dealers advertised them as being chambered for the commercial .308 Winchester round which is incorrect, actually it's chambered for the 7.62 Cetme round used in the Cetme Modelo B(M58) assult rifle. The 7.62 Cetme and 308/7.62 Nato have identical case dimensions but differ greatly in working pressures. IIRC, the Cetme round operates at about 45,000 psi where the 308/7.62 Nato is around 58,00-60,000 psi. It's not wise to fire full power 308 or 7.62 NATO ammunition in converted 1916 rifles. Down load to 7x57mm pressure levels and you'll be ok.