OSE ARAD (1974) 5173 2080 601-630 Bm carriages
Photo Balkanmodels: April 1995 NES Thessaloniki. Carriage 5173 2080 606-3 resting in Line 8. Easy to spot with the long handrails and unique raised metal 2s to denote their class. Some were painted white and red in an attempt to run them uniformly with the EN red and white ones. I don't think I have a photo but I have seen one on the internet.
christo.