Class 73 - Caledonian (Current) - 73970 W. S. Sellar - DCC Sound Fitted73970 Caledonian Sleeper, Current The partner to 73966 in its current condition is 73970. This locomotive was converted from JB E6023 73117 which was built in March 1966 at the Vulcan foundry. Converted in 2016, this locomotive became the only namer of the Caledonian sleeper 73s on the 24th of May 2024 when in a ceremony at the Boness and Kinneil railway it was given the name W. S. Sellar in memory of founding member of the SRPS. The name had