Black and white, old and new, night and day

I have some tiny "toys", in scale 1:160. In many different colours, yellow, blue, red, whatever.
Two locomotives, I think, suited best for the black and white theme today. Namely a white one and a black one. Having taken the picture I realised that this is not only black vs. white, but also old vs. new.
And night vs. day. Today is what Germans call Tag-und-Nachtgleiche, day and night are the same (namely equally long).
Thanks to MaryElizaR for hosting the Tiny Tuesday challenge.

PS: the pins have no function, they are just there to show the size.