Definately not AU... More like aVF-VF. All the Crown details are gone, the 'Brustschild' and surrounding wreath show a lot of wear too. You may get a few EURO for it off the right person, but for most collectors, that represents a 'Hole-Filler'.
I must however add some other values; I have no idea where Krause got those numbers from, but the most upto date Catalog I have on hand, says current 'market value' is 6,00 EUR for VF (upto 180,00 EUR for BUNC) - therefore, realistic value is probably no more than 3,00 - 4,00 EUR...