Those are 500 series joysticks by Suzo. Wico is no longer a manufacturer of joysticks. They are a distributer and they get their sticks from Suzo. I'm pretty sure Randy T's sticks are Suzo sticks with his own alterations and improvements. Of course I'm not positive about Randy's sticks so don't quote me on this. I would confirm this with him as I don't want to misinform or pi$$ anyone off.