Exactly - black ironwork was also seen on quite a few British wagons, but not here. Naturally, Hornby stuff, in imitating BR, will often have black chassis but as mentioned this is wrong for Ireland. Further to the question above, yes, it was about 1970 that brown started to appear. The only wagons never painted brown were the corrugated opens, not until they were "double stacked" latterly for beet.