Ferrier 120 fuel tank colour

[mikemike]

I am restoring a 1950 Ferrier 120, the model with the wrap-around steel tank.
Does any know what colours the tank and decal should be?
I have heard that the later ones had a red glassfibre cowl (in the early 1950's?).
The models with the cylindrical tank had a black tank and red and black decal (thanks Steve and Graham in Aus).
I have prepared some art work for the decal/label from black and white pictures and photos of the cylindrical tank version but need to know the correct colours and the dimensions of the decal.
I will post a 'photo of the motor/decal if anyone is interested.