(the individual pictures are stock/sample scans of singles from another set so you can see details of the designs, so obviously positioning of lines is slightly different in the blocks). Authenticity guaranteed without a time limit. As I always want to be as helpful to customers as possible..............Powered by SixBit's eCommerce Solution. The item "SPAIN Civil War 1938 Submarine Mail IMPERF PROOFS full set GENUINE BLOCKS" is in sale since Monday, May 25, 2020. This item is in the category "Stamps\Europe\Spain & Colonies". The seller is "chris_ceremuga" and is located in Sydney. This item can be shipped worldwide.