B.Bloch & Co.Rare Replacement cup which has 2 numbers on the bottom, I am making a guess that the number for the pattern is the same color as the Pottery Mark so therefore it would be 13 as shown, and the # 34 would be designating the production/ date/ or number of items produced. Makes Sense to me! Anyway all is shown in the photo.Beautiful design though and Replacements.com did have it about 5 years ago when I first checked, but they don't have it NOW so there you go WRITE every thing down!! Shipping is $1.75 Domestic USA 1st class mail package.