The numbering system of Wiener Werkstätte postcards has caused much confusion to collectors over the years. Although the postcards were printed with numbers from 1-1012, there were actually only 920 numbers assigned; 5 of which were assigned twice ( #164,394,395,396,397) thus bringing the total number produced to 925. The actual numbering system is: 1-920,962,1000-1012 with