20mm phalanx marking partially missing


#1

hello
i acquired recently a 20mm for phalanx but the marking on the case is partially missing
what number is ? mk149 1 or 2 or 4 ? (projectile orange)
do we had the complete markings ?
i have printing on this:

iring
adl

20mm m103
acn
85k006-058

thank in advance for your responses