GB QV SG187 1883-84 1/2d Slate Blue Block of 10 Unmounted Mint Fine quality Rare. A lovely multiple example for your collection.Rare to find these days in this condition with top margins. Please check my other collection of GB QV items Any queries then let me know. The item "GB QV SG187 1883-84 1/2d Slate Blue Block of 10 Unmounted Mint Fine quality Rare" is in sale since Sunday, November 17, 2019. This item is in the category "Stamps\Great Britain\Victoria\Surface-Printed Issues". The seller is "11belinda123" and is located in Harrogate. This item can be shipped worldwide.