Need help IDing some ammo.

[filbert]

I have this spam can of ammo and am not sure what it is. Is it 7.62x39 or 7.62x54r? I can read 762 and 550 on the can, there looks like Chinese writing on it. So I believe it is Chinese. I still shoot 7.62x39, but not 7.62s54r. So can you tell me what it is? I would open it but if its not 7.62x39 I would like to sell it as a sealed can. Thanks

 

[dlbleak]

If the 550 is the number of rounds in the can, it may be x39. The x54 cans have 440 in them

 

[Defcon Shooter]

Looks like 7.62x54R in strippers