As far as i know, a few Lada Nivas were bought by OSE in 1990-1991 with initial number plates ΥΒΜ 24ΧΧ and ΥΒΚ 90ΧΧ. The initial color of these Ladas was mainly dark blue, and I guess that a few of them were repainted to that dark red color and got the new KHI plates (the road vehicles of OSE were very usually changing numbers).
Here is a pair of two i had found at Thessaloniki. For unknown reason, the OSE logo can not be seen painted on at least the left one.
There is also one more blue like these two, at Athens station, dumped between the platforms and the "under construction platforms". I have seen it a couple of times but never photographed it ...
