The diagram looks to be from the time when Sapperton worked TCB to Swindon Panel on the up and AB on the down, so between March and October 1968.
Photgraphic archive of Swindon Panel and the Swindon Panel Society
Please visit www.swindonpanel.org.uk for more information on Swindon Panel Preservation.The diagram looks to be from the time when Sapperton worked TCB to Swindon Panel on the up and AB on the down, so between March and October 1968.