Heljan 5201 Class 52 diesel locomotive model, specifically numbered D1037 "Western Empress" in BR green livery.  Scale: OO Gauge (1:76 Scale). Livery: BR Green. Manufacturer: Heljan.
This is mint/ virtually new in the box. The previous collector didn't run them, just collected. I've tried to show the condition fully in the photos. It is stunning. Any questions please ask and I'll try to answer.