Thanks Dale & Ron,
Colour is hopefully Khaki Green No.3. I do have a NOS part in matt green with the colour being close enough, especially once it fades.
Diff is pulled apart. The axles had been removed at some point so I was not expecting good things once the diff was opened up. In this respect I was not disappointed as ,despite there being plenty of petrified oil, the pinion is quite worn and at some stage the crown wheel has dropped bits on a few teeth.
As this carrier was fitted with the muff coupling, I want to keep it that way. I had thought that this was the last style of the three couplings but after research on the web, it seems that this ten splined pinion was late 30's and according to the hot rod forums, hard to find
Other that the crown wheel and pinion, the rest of the diff is very good, I'll throw a complete set of new bearings in there whilst it's all apart.
I'm also a little perplexed by the brake hub springs. It seems also that this four spring configuration was unique to 1938. Consequently there is very little information on the return springs and I can't locate any modern equivalents. Any ideas?