A fine Great Western Railway Slot repeater in superb condition, these instruments were mounted on the signalbox block shelf to indicate to the signalman the slot on the distant signal had answered the corresponding signal lever. Where the Distant signal of the box in advance was close to the section signal of the box in rear the Distant signal would be mounted on the same post. This instrument has a brass plate with two numbers meaning it repeated two Distants and the flag has "SIGNALS", A mechanicial method was provide to prevent the Distant signal being lowered when the section signal was at danger. This fine instrument dates back to the 1880s when the GWR were making their own instrument at Paddington. The base is marked GWR Makers, a rare instrument indeed.