just got me a mego after 30 years

[mwp]

i just got me batman mego off ebay, I did some research before i bought it and i used the mego museum web site for reference, im wondering if theres a way to tell the exact year/issue of this particular mego doll or what the head /body stamps indicate.. the back of the head(molded cowl NOT removeable) has the NPP 1972 head stamp and the body (plastic joints) has Copyright mego roman numeral 1972 hong kong on the back.(hong Kong?) unfortunately mego museum accessory check doesnt indicate what any of this means or if this is original or what. ive compared everything else on mego accessory check gloves, head boots clothing emblem all look to be original mego. this is weird to me cuz far as i know megos didnt come out till 73 and the molded cowl wasnt till later...