NitroX, I based a 22-250 on a Columbian Mauser. On the plus side, the action held up well to thousands of shots (some of which were almost certainly over-pressure). No setback of the locking lugs, etc. But the actions do tend to be rough (yours is typical, with pitting below the wood line, etc), and there is no way to hide the notch cut in the front ring to allow loading the '06 cartridges. You'd have to decide if you could be happy with the action cleaned up but still showing traces of past wear/pitting/etc.

"Ejercito de Columbia" is "Army of Columbia". "R. Famage" is the arsenal that converted the formerly-7x57 rifles to .30-06; 1952 is the date of the conversion. The rifle was probably originally made by FN, but might be a CZ or Steyr. Probably dates from the 1930s.

Were it mine, I'd probably cut the barrel down to around 48-50 cm, fit some decent iron sights, and maybe paint the stock with bedliner. It would make an excellent work rifle/rainy-weather hunting rifle.