Understanding the TOPs numbering system - locos and rolling stock @HattonsModelRailways
Understanding the TOPs numbering system - locos and rolling stock  @HattonsModelRailways
Uploaded December 2020 | Updated September 2026, 3 weeks ago
Ever wondered why a Class 37 is a Class 37, or a Class 66 is a Class 66? Unlock the secrets of the UK's diesel and electric loco running number system and ask your questions live.
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Understanding the TOPs numbering system - locos and rolling stock

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