Assuming that the case were cleaned up a little, and the size reduced to around 40 mm (which is the size of the Carrera Heuer that I bought in 2010), I would buy the blue one.

I would be happy to have the black one, but already have enough black chronographs in my collection; I would want to see the green one in the metal, before making a decision; the white one just does not look right to me, so I would "pass" on that one.

Regarding the black, blue and green models -- While I was playing with the Photoshop, I would lighten up the markers . . . they look too fat / heavy, with the bezel removed.

Jeff