That is a very correct remark, Nigel, according to majority of sources the greyish green appeared rather on later variants. Many thanks for the heads up, mate!
I decided to take the advice and used a mixture of Droolling Bulldog Umbraun lightened with Cream yellow and a very tiny addition of greyish green to give it a bit of khaki shade.







Currently the brown is rather light, but I expect it to get darker once the consequent techniques like wash and oil paints have been applied.
Next up are decals and wash.
Cheers.
Ondra