I would hope you have the new 510, no way of knowing unless you open it up. If you have tanks that don't make contact though my guess would be the press fit 510.so since mine was a sealed retail version (3 weeks old got it the day store had stock), i would hazard a guess it's got the corrected 510? I don't really want to open it.
I noticed regardless it's a pooey 510 in that the minimum distance is too deep. tanks with shorter 510 pins don't make contact at all with it here.
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