Vintage Retired 1981 Oklahoma Car Truck License Plate, ZZG-225, Green on White with State Shaped Hyphen, Tulsa County, Month Sticker Decal, July, Year Sticker Decal, 1994. 12" x 6". 1981 Passenger Issue, The State returned to Green on White and the "Oklahoma is OK" slogan. Issued through the end of 1982, the plate had the year lightly debossed in top right sticker box. Plates of this era could be seen in use through 2009 with proper stickers. This issue of plates were the first to use the state - shaped divider between the numbers and letters. Standard County coding, which has been in place since 1963. ** This plate does have some condition issues as shown in the photos.