Ausführung
Abbreviation: Ausf.
model; the way in which something has been carried out
Used to denote the sub-version of a vehicle, usually using a letter, for example Panzerkampfwagen IV Ausführung A. The system was similar to the British Mark
and the American A
notation for equipment variants.
The letters were often, but not always, used alphabetically. The letter I
was not used, as the upper-case I
was typographically identical to the upper-case J
.