[Coco] 2 Button Joystick?

[Corey Bryant]

I keep reading about CoCos supporting 2 button joysticks, but I have yet to even find an example of one.   I've seen the typical RS black one button type, which is what I have.   I've also seen a "deluxe" which is beige and has a button on the top.  Can someone point me in the right direction here?

Or does the deluxe seen here [ http://vintagecomputer.net/tandy/trs80_coco3/TRS-80_Deluxe-Joystick.jpg ] have 2 buttons and I just can't see one?

Ty!
Cor