Station bay indicator
Block instrument; NLR (Tyer's) Station-Bay Indicator. Absolute/sending 4-needle (all red) 2-position/2-indication "Bay Blocked/Bay Clear", each with its brass/dark-red plunger beneath and labelled (L to R): "No. 5-8 Bay" on alternate ivorine/enamel scallopped-cornered (small LNWR-style) plates. Enamel-plate with rounded ends at top middle reads "Broad St No 2". Ex. Broad Street. SB?