A German phrase meaning “official test number,” usually abbreviated on a wine label as A.P.Nr. The Amtliche Prüfungsnummer indicates that the wine has met the minimum standards required by the law. It’s granted by an official testing control center where the wine is tasted and the results of a chemical analysis (performed by an officially recognized laboratory) reviewed. The number, which must appear on the label, identifies the control center that tested the wine, bottling location, bottler’s registration number, bottler’s application number (indicating the wine lot), and year the wine was tested (not the VINTAGE year).