In Austria and actually also in Germany, the following designations are common:
K, Kabinett (= luxury), that is above-average quality in all aspects of a brand, collector's price
P, Pracht, splendor (=finest), that is the usual commercial quality, with a certain range of fluctuation from slightly below average to slightly above average.
SS, sehr schön, very fine, (=fine), that is below average quality but worth collecting.
Best regards
Bernhard
