Where is the Serial Number on MiniMag valves?

[Dover]

i own a rather older MiniMag valve with lotsa surface "damage", kinda faded "MiniMag" lasering and can't seem to find the matching serial numbers.

Should the Serial Numbers be on the passenger side, behind the air fitting port ?

[sjrtk]

yes below the fitting.

[Dover]

well all the other markings are visible, but there is no matching serial numbers on the Minimag.

i wish i could take pics of the Minimag valve, both the logo and fitting side but don't have a good enough camera