Hello and thank you so much for your speedy replies. Yes it does have 3 coloured glass lenses, red, green and clear. The lamp twists so that you can change colour. The wick looks like its never been lit. My Grandad used to work on the Cranes (not sure what kind of cranes though)around the railways in stocksbridge, Nr Sheffield and the only markings I can find on the lamp are BR and E. thanks again you are all so helpful. Kind regards Katey
