The decal on my '56 was a simple text instruction stciker on the back of the sun visor. I attempted to reproduce it as close as possible with my printer when I recovered the visor. I believe I still have the test around somewhere.
So far haven't seen anything on the dash, but I haven't gotten to stripping out the old paint & gunk on the dash yet.

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P