Colombia: “Industry” Stamps 1932-1951. Printings, Unlisted Varieties, and Flaws

In 1932, Colombia issued a series of stamps featuring various industries.   New designs were introduced in 1935 and 1939, and many of the designs went through various printings through different printing companies. I don’t have many of the examples noted, but have added images of those I do possess. During this period, for these […]