I wanted to add Working ground signals that were robust and cost effective for my OO Gauge railway layout, these are the result. So I decided to make extras which might be of interest to other modellers. Made from brass, painted, with Working 3volt dc lamp and coloured lenses with piano wire control rod which are designed to be connected to a servo motor (not included). They require a small hole through baseboard for control rods and additional hole for lighting cable and have 3 holes that can be used with track pins (not included) or can be carefully glued in place (recommended). Price is for one signal.Please see my other listing for single and triple shunt/ground signals.