Yep, the parts list for the PowerTorque TAC shows identical washers on both sides of the blade.
This one: https://www.outdoorking-forum.com.au/index.php?main_page=product_info&products_id=8321

This Brit website has downloadable parts diagrams for that model:
http://www.powertoolspares.com/buy-...els-1987-1995/quickrefoldmodels19871995/

Sorry, can't post the URL's as links, that doesn't seem to be working.