Found this handy guide on how to read the markings on combloc spam cans and cases:
http://www.conflictarm.com/publications/
look under 'guides', there's one guide with info on cases- round count and weight for each country; one guide on case/can markings, and even a bonus guide on kalashnikov markings.
http://www.conflictarm.com/publications/
look under 'guides', there's one guide with info on cases- round count and weight for each country; one guide on case/can markings, and even a bonus guide on kalashnikov markings.