Look at the p/n if it is trp-I or trp-e is new EVO2

if it is just trp and trp pro then its old unit

also
TRP-I = ifmar version
TRP-E = EFRA version

pro stand for AAC also with the blue head

pacman: that is 2 adjustment carby comes with ABC

SirioInside: 3 adjustment carby comes with AAC