British Railway BR. 29987/12 Supplement No. 2, Working Instructions for A.C. Electrified Lines dated 1975. To come into operation on 6th October 1979. 3 sheets of detachable amendments with a gummed strip on the back. Has been folded and has some staining. Buyers of multiple items, I can combine P&P providing you wait for an invoice before making payment. Log into ebay.co.uk and place the items in your basket, then use the “Request Total from Seller” (do not use the Proceed to Checkout button). I will then weigh your items and send you an invoice.
