Bessie
Member
- Joined
- 30 Oct 2017
- Messages
- 259
Sorry if this been asked before on a previous thread but with the likes of Class 69s, 230's and 769's being "built" from existing machines what makes them get a new TOPS classification versus say HSTs back in the day which were re-engined and retained their same numbers. We had class 57's from re-engined class 47's but the re-engined 73's became 73/9's rather than a new TOPS classification.