In date order:
Tyrol (26mm steel tube on fixed, 30mm FFP on variable)
Habicht (Steel tube, 1", non-NOVA)
Habicht NOVA (Steel tube, 1") (produced at same time as next one)
Habicht A NOVA (Aluminium 1" tube, 2FP)
Habicht A (Aluminium 1" tube) last version before AV line
Al (Aluminium Illuminated, note that the l is for illuminated reticle, not a capital L)
AV (American Variable 1" tube, 2FP)
PV / PF (Professional Variable / Professional Fixed, all 30mm except 6x42)
Z3 / Z4 / Z5 / Z6
NOVA is a scope-eye reducing mechanism whereby the eyepiece is spring (rubber?) mounted in case it meets with your noggin. They still had (have) it but no longer add that descriptor to the scope.