A display of items from Severn Tunnel Junction Signal Box mounted on a wooden board. Comprises :- two different, wood cased Block Bells of GWR origin; a 1948 wood cased Block Instrument and an array of traffolite Signal Lever Plates including 'Down Tunnel Line Facing'; 'Down Tunnel Line Starting and 'Bay Starting To up Tunnel Line'. Also 'Severn Tunnel West Tunnel Lines' traffolite shelf plate.