: kă-shāˈ n. A commemorative design stamped on an envelope to mark a postal or philatelic event.
On view in the Green Library Gallery July 2012,
Naval Cachets from the collection of Maksimilian Dikarev
& WWII militaria from the Military Museum & Memorial of South Florida.
"cachet." The American Heritage® Dictionary of the English Language. Boston: Houghton Mifflin, 2007. Credo Reference.