It typically refers to the 3rd and 4th digits from the right in the German AP number. AP is short for Amtliche Prüfungsnummer, which is an official ID number under the German wine regulations.
Different wines have different AP numbers even if they are from the same site. Here Weingut Willie Schaefer typically makes more than one Auslese from the Domprobst vineyard (hillside) in the town of Graach.
Wines with different AP numbers can be arbitrarily different. Micro site, botrytis, pick time, single cask or mix of casks, etc.
If you Google, you can find the typical differences between the Schaefer Auslesen. The non-auction Auslesen have consistently used the #11 and #14 designations since 2009 IIRC.
The way to find this out in the store is to use the internet on your smart phone. There may be some information available on the website or in a Mosel Fine Wine issue.
I know how to use my smart phone in a wine store, but it would be helpful if vintners provided that differentiation information on the label — as Ridge or Calera explains tech specs.
But I suppose it’s too much hassle/time/work/cost.
The cask/parcel names on the labels have helped significantly in the recent years. Still see some retailers list some of the wines with neither the AP # or the cask/parcel name. Frustrating, but usually a quick call to the store solves things
One thing I’d add as people try to decipher AP numbers is that higher absolutely does not mean better - or worse. I’ve decided that AP numbers, from an overall quality perspective, are random. With different assignment algorithms for every producer.
Definitely a lot of fun to figure this stuff out if you are pleased by research. And once in a while you get a prize .
Very important to note. It’s basically a serial number for the wines to differentiate them The numbers themselves have no numerical representation in terms of indicating quality, or anything else
I’d say that’s generally true but as we both know, it doesn’t mean when producers are somewhat consistent about how they use AP numbers yea to year (only a very few still), there are discernible differences between wines year to year. For example, Schaefer since 2009 and Falkenstein since 2015(?).