Wartime bus ticket with salvage message

Cresswell's Bus Service (Worcestershire) 1 shilling and ninepence ticket marked with a salvage message to the rear 'WASTE PAPER is INVALUABLE - WASTED PAPER is WICKED'.  Small pin hole with minor rust stain around it, otherwise very good unused condition with stub still attached.  An unusual wartime item.  Stock code BO711.