1960 Mint Proof Sets. You will receive all 10 – 1960 Proof Sets, Thats 50 coins in total. All packaging is in Great condition. There is some writing on all the packages in pencil, SD is written on all of them, I did not do this and do not know exactly what it could stand for, It might stand for Small Date but I tried to compare small dates with large dates and I cannot see the difference. Comes with the two cardboard protectors and a green certificate of inspection all inside the original US Mint envelope. Some coins may have some toning and or tarnish.