actually my old timer I've never carried. Also given to me by my Grandpa Owen back int the 60's. I have a SOG utility knife (tool) my wife got me back in 1988, carried it for 30 some years, just made a new leather belt case for it, and passing it to my youngest daughter shes 26. But the info is engraved into the rear of the Veg Tan Leather holster.
It is putting your life at risk to stop and allow a mob to swarm your truck. If ac·qui·es·cence were all they wanted fine, but many of these people are excited to blood lust by now. To avoid all risk, one must hide under the bed at home. I'm not going to do that.
I see that red rocker switch right next to the Fifth wheel slide, it is a fifth wheel lock not a release. That pic is from a Kenworth advertisement for available switch placement on a T880. Here is one like you describe. Up here in the Great White North, I believe they are not legal for OTR trucks.