If you like tax tokens I suggest finding a copy of "United States Tax Tokens And Stamps: A History and Catalog" by Merlin k. Malehorn and Tim Davenport. Has a lot of information and then a chapter on each state and the associated tax tokens and other items of interest.
In regards to your tax token - est 60,000,000 mintage and there are 7 major die varieties - the SE in the word "purchase" is the easiest way to tell which variety. It appears yours is S1B as best I can tell from you picture.
Washington also has paper tax scrip (est 7,000,000 printed). Varieties here include front/back right side up as related to each other and front/back upside down as related to each other.