Chick,
Our 68 console gage sticker & speedo tic-tac clock cluster sticker-
I'd like to take a look at your entire decal for both the gauge cluster and the instrument cluster. If you have a picture of the entire decal would you mind sending me them to me in a PM? It is interesting to note that the '68 gauge cluster decal is orange in color while the '69 gauge cluster decal is dark blue. Also, my instrument cluster decal had "G.G." after the black whereas your didn't...hmmm
Brian,
now there is only one console and one set of console gauges for 68-69, but the true 68 had a different bottom shell with the scallop edge for the harness to exit being different then the 69 version that survives as best of breed today
When I took my console out there was not a "cutout" in the bottom shell for the console wiring harness to pass through. In Chick's build thread I posted a picture of how the harness was brought into the console underneath the carpet. The "ears" that hold the console ashtray were broken on the top shell of my console so I was forced to buy a reproduction console shell. Lo and behold, the reproduction console (which is advertised for use in both '68 and '69 cars) that I received has a large cutout for the wiring harness to pass through! So it would seem that the reproduction consoles have adopted the '69 console for use in the '68 as well, even though technically, the '68 console did not have the large cutout in the bottom shell. Now how that harness attaches to the "U" shaped bracket is a topic for another discussion!

I expect the black is for the gauge cluster face outer rings?
The instrument cluster outer rings are chrome so I don't think that's what the black stands for. Maybe the it represents the color of the instrument plastic housing??
Bob,
Interesting red 68 decal, any idea what (M)W, G.G. and AC represent?
The instrument cluster decal is more orange in color (I've included a picture of my original in this post). Couldn't tell you what the (M)W, G.G. and AC represent but Brian's guess is as good as any at the moment.

67 decal size is 1" x 2 1/2" with black printing. The one I have is not readable but print layout is the same as your 68 decal.
I've sent you a PM for a little clarification on this.
This thread has morphed into a bunch of different topics but all good stuff!!
Thanks,
Bob