WW1 London & South Western Railway L&SWR war service badge

A scarce original First World War period 1914-1918 war service lapel badge for the 'London & South Western Railway'; gilt blue enamel title surround, Crowned 'Railway Service' to the centre on white enamel ground, the reverse impressed with maker's details 'J.A.Wylie & Co' and official low issue number 'O 1772'. Good condition, complete with original buttonhole lapel fitting, minor hairline cracks to centre, but no enamel loss, slight ding to left rim. Diameter approx 28mm.