printing placed on top of a <#stamp>‘s <#face> for some special purpose. Overprints have been used for <#precancel=precancelling>, <#serviceinscribed=service inscription>, <#surcharge=surcharging>, <#commem=commemorative> and security purposes, and on <#amg-gen=AMG>s. Example: Hawaii Sesquicentennial stamps (<#scott=Scott> 647-648).