LOL... Okay if you see it that way I'll go along with it.
I was under the impression that "steam gauges" were the old style displays like analogue ASI, altimeters, VSIs and so on and that a "mixed" cockpit was a combination of both EFIS and steam gauges (601-3R).
Full EFIS like the 604, Globals, GIVs, GVs, etc...