Dutch dealers catalogue: Netherlands and colonies. Stanly Gibbons: Great-Brittan and colonies. Michel: Germany former Eastern-Europe Asia Europe. Yvert & Tellier: France and colonies Worldwide.The item "Nicaragua 1931 YV Airmail 9a Ovpt ERROR signed MLH VF SCARCE" is in sale since Tuesday, December 4, 2012. This item is in the category "Stamps\Latin America\Nicaragua". The seller is "inverstamps" and is located in Amsterdam. This item can be shipped worldwide.