Each piece has first quality backstamps as shown and all pieces have identical date marks as well. Price is for 4 demitasse cup/saucer sets and I do have additional matching sets of 4 available. The item "Royal Crown Derby OLD IMARI Demitasse Cup & Saucer, 4 Sets, 1st Quality, EXC" is in sale since Friday, October 27, 2017.This item is in the category "Pottery & Glass\Pottery & China\China & Dinnerware\Royal Crown Derby". The seller is "dannylin" and is located in Ridgewood, New Jersey. This item can be shipped worldwide.