Czechoslovak first day covers, a selection
10/02/11 – Selection of Czechoslovak first day covers (FDCs). Typically, FDCs are special issue envelopes promoting the release of a new stamp or stamp series. They feature a unique post mark (cancel) indicating date of issue, and artwork, called a ‘cachet.’ This small selection dates from 1968-71 and all cachets are engravings.
Sources and related information
Czechoslovak FDCs on Flickr//