MS 406 instrument

[ClinA-78]

Hello,

On the 4th September 2010, I have recovered the wreckage of the MS 406 Nr.86 (GC II/6) in Vellereille-Les-Brayeux (Belgium). It was piloted by Capitaine Albert GILBERT, 'Mort pour la France' on the 14th May 1940. The dig revealed a lot of most interesting items, buried for 70 years. It was also the first time that a Morane-Saulnier 406 was discovered, buried deeply in Belgium soil since May 1940.
The parts would be displayed in the following months in the 'Fort de La Salmagne' in front of the airfield where Capitaine Gilbert took off for his last flight.

Among the curiosities found, was this part of the dashbord with the variometer indicator. Unfortunately the docs about French instruments are lacking, beside 'THE' Lela Press MS 406 book showing only two cockpit pictures.
Here are my questions:
1°) Was it the 'contrôleur de vol type ACDFK (what is that meaning?)' thus one of the 'PSV' instruments (following a sketch found on internet)?
2°) Why was it 'blackened'?
3°) I research also a good picture of the 'three face' MS 406 dashboard.

I thank you beforehand of your attention.

Best regards

ClinA-78