How do I get this off..the trip reset?

[ZCore]

I'm trying to take my speedo apart to hopefully reset it to zero. (its stuck on 15 when not moving) and I can't figure out how the trip thing comes off so I can slide the face of the speedometer out. I'm sure its something really simple I'm totally overlooking.

 

[aggressive perf]

the trip reset

I know what you need to do it is pretty simple, but it will be alot easier to help you over the phone if you can call me in the morning (586)771-9122
Bruce Alred