Hi Marcin
I bought the English edition (but when they were sold for 9 Euro each) .. seems nowadays only the English editions include the goodies (though I would prefer if every time decals were included and no masks or colour chips like in the air minature booklets)
As for the interior colour. One of the best books is Kenneth Merricks 2 vol
"Luftwaffe Camouflage and Markings 1933-1945". (I do not have my Ullmann ring binder here, so I cannot check that but I can hardly believe there is a difference as both stem from LDv.521).
In Merrick Vol.1 Appendix B you find the
Interior Colours: RLM 02 (in different types of paint) was widely used from 1938 inside aircraft (
pg 207 4th paragraph). but 66 was used for instrument panels (
pg 207 5th paragraph). With the new LDv 521/1 from November 1941 (!) RLM 66 was ordered to be used on all surfaces visible from the outside (
pg 207 9th paragraph). I like to add, that there may be differences when the orders were put into production.
I did not read the whole appendix now so I might have missed something but these are the facts i already mentioned above and I do not think this will change reading the whole book. There are always exceptions to the rule and if you can prove that with pictures it is really nice. In my book most/nearly all Bf 109 E should be RLM 02 in the cockpit.
The E series went into production in 1938 (Schick/Radinger:
Messerschmitt Me [sic!] 109; Alle Varianten von A bis E, Aviatic Verlag 1997; pg. 78 f.) The production of the Bf 109 E phased out on all manufacturers between January and March 1941, last machines delivered in June (
Schick/ Radinger pg. 104). Of course there came some more rebuilt airframes from the Industrie-Instandsetzung were machines with more than 60% damage were rebuilt and thus I think it is possible that there might be some in 66, but having read that I think even Pingel's E-7 is 02 in the cockpit area and the dark appearance just an optical illusion. i will paint it accordingly.
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my 2 ct.
all the best
Steffen