Hello,
Finally, I think she will be RLM74/75/76, I found something:
"Grey Camouflage?
Although often totally destroyed, all enemy aircraft that came down in the British Isles during the Second World War were thoroughly examined by intelligence teams from the Air Ministry and RAF. The reports created from these examinations were known as Crashed Enemy Aircraft Reports, and recorded such information as Werk Nummer, engine type, armament, additional or special equipment and often, markings and colours. However, and to the disappointment of many post-war researchers, there were no set guidelines in these reports for describing the shades of the colours found on these downed aircraft. Generally, any examination of the paint was confined to an evaluation of the type of finish and occasionally, some undamaged panels would be tested for paint durability.
By mid-August, the first uses of greys and blue-greys as an upper camouflage colour were making their appearance in these reports, appearing with increasing frequency as the battle progressed. 'light navy grey', 'two shades of grey', 'light grey with dark grey mottling', 'Battleship grey', 'mottled greys' and 'camouflage grey' were some of the descriptions given, along with mention of varying shades of green-grey and blue-grey. Were these an indication of the earliest use of the greys 74[9] and 75[10] that would become the standard fighter camouflage the following year or, as recent research and correspondence indicates, that they were colours originally created at unit level?
Since the appearance of the original version of this article I have received written confirmation from two former Jagdwaffe ground personnel confirming that on occasion, various grey shades were mixed and applied to some aircraft in an attempt to find suitable concealment when flying above the waters of the English Channel. Confirmation that this occurred ties in with known practices carried out on Luftwaffe aircraft where a new paint or colour was applied to selected parts of an airframe to test its viability under operational conditions. It can be found that the mixing of various combinations and percentages of the colours 02, 65, 66, 70 and 71, or similar colours in contemporary paints will produce a variety of grey and blue-grey shades. Most, if not all of these 'grey schemes' would have been suitable for use in the prevailing situation on the Channel Front in the latter half of 1940. It is reasonable to assume therefore that some of these shades were no doubt almost identical to the later 74/75 greys thus leading to the belief in some quarters that this series of colours had been applied to Bf 109s in the summer of 1940. However, as the use of 74/75/76 was not officially promulgated until the November 1941 issue of L.Dv 521/1[11], it is a wholly convincing possibility that the various greys used during 1940 were those from which they were developed."
Found here
The 109 Lair- The Online Source for Messerschmitt 109 information
I read too that Bf 109E-4/N W.Nr.5819 flown by Adolf Galland in December in 1940 was "very possibly" in RLM74/75/76 or repainted in RLM74/75 on the upper surfaces...???
Thank you all for your help, cheers
steph