These locomotives were introduced to service in 1952/53.
The loco numbers were B 60 - B 85.
They ran mainline trains of all types.
Many of them ran to over 1,000,000 miles.
In the mid 1980's, eleven units were rebuilt to 2300hp and reclassed _A__ with the same numbers retained.
File c307m compiled by Peter J. Vincent, updated 29/9/2007, checked 18/2/2026