While the male mascot was a national celebrity after the 1963 launch of the Zone Improvement Plan (ZIP) , his female counterpart remained largely unknown for decades.
ZIP placard or more details on the ? Mrs. ZIP placard | National Postal Museum MRS zip
: The existence of Mrs. ZIP was only confirmed in 2008 when curators at the National Postal Museum discovered a stand-up placard of the character. While the male mascot was a national celebrity