1½d dull purple & green. A very fine UNMOUNTED MINT block of 4 overprinted by SPECIMEN type 9.We also only send to confirmed addresses. 1½d dull purple & green. A very fine UNMOUNTED MINT block of 4" is in sale since Thursday, April 18, 2013. This item is in the category "Stamps\Great Britain\Victoria\Surface-Printed Issues". The seller is "bbstampsltd" and is located in Basingstoke. This item can be shipped worldwide.