Anyone know what a 10c Washington state tax token is for

Got a battered token in the big lot I found.  It had Washington tax token for the value of 10 cents for the law of 1955.  Anyone know what these were used for?  I can possibly post pictures of it tonight.

http://www.taxtoken.org/faq.htm

Thanks for that, are they worth anything, or just a curio?

I've seen them listed for about $1 or 2
http://www.ebay.com/itm/State-of-Washington-10-cent-tax-token-low-shipping-price-/181056625500?pt=Coins_US_Individual&hash=item2a27d0db5c

Verweis : @josephjkhttp://www.taxtoken.org/faq.htm

Thanks for the informative link.. But boy what a PITA it must have been to have to use these...