Railway Detonator Signal – Pack of 20 – “Collection Only”

Features:

• Size: 51mm diameter by 9mm deep
• Case: The outer case of each signal is comprised of two parts, a base plate and an upper flat-topped dome, both are made from cold reduced tinplate of thickness 0.43mm and joined at the rim
• Construction: The rim joint is comprised of a single fold, made by bending the edge of the upper part of the case underneath the base plate and sealed to prevent entry of moisture
• Percussion: Each signal contains five percussion caps fitted on an anvil made of tinned malleable iron, sufficiently soft not to indent the rail. The anvil assembly is held securely in a central position on the base plate by a perforated tinplate disc
• Explosive: Each signal contains 8 grammes weigh of gunpowder
• Binding Strip: Signals shall have a lead strip, average length 178mm by 6.4mm wide and 0.8m thick firmly soldered to the base plate