AFAIK the gauge panel was used for 52mm econometers, ambient temperature gauges, voltmeters, clocks (for when the clock in the dash was replaced by a rev counter) and a timer for the parking heater.
Ideal would be this combination:

But this would do too:

Here's some info I've come up with:



Has anyone ever seen the clock (white numbers) Part no. 284230-0 ?
Tom