Cam help

[450RRyder]

Ok guys I just bought a hot cam stage 2 off of ebay for 100 bucks. I know alot of you have hot cams how would I know if the cam is a real stage to cam. any markings or anything that would help identify the hot cam-ness. Help

[desratt]

break out the micrometer

[450RRyder]

that would make since what about the letters stamped on the cam