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 "Colombia covers 1919 YV Airmail 1 RARE 1st Flightcover ATTEST Sismondo" is in sale since Monday, January 19, 2015.This item is in the category "Stamps\Latin America\Colombia". The seller is "inverstamps" and is located in Amsterdam. This item can be shipped worldwide.