Good information. Looks like I'll do the white underside, a black cowling, and something a bit darker than RLM 02 Grey, probably the RLM 71, for the squiggles.
Oh, I sure hope the Harvards hit by the bus in the movie were mockups and not real aircraft.
I would be really very carefull of the RLM 71 for the squiggles. Below, a couple of quite close-up shots show the squiggle colour in the sunlight. Both these Harvards and the Ju-52 seem to have the bands of a grey pain but not of a green. The RLM 71 and the RLM 70 belonged to the range of green colours. The paint tone seems to be more pale than both of the RLM colours while applied on a white background.
the pic source: same as above