I ran across these photos of the electroluminescent instrument lights used on the 1960-62 Chryslers.
This is just the speedometer section:
This shows the actual electroluminescent material with the numeral mat peeled back:
And here the complete "Astra-Dome" instrument panel with all EL gauges illuminated:
This is just the speedometer section:
This shows the actual electroluminescent material with the numeral mat peeled back:
And here the complete "Astra-Dome" instrument panel with all EL gauges illuminated: