WW1 National Reserve Wiltshire home front numbered badge

A good original early issue First World War period 'National Reserve Wilts numbered badge', small pattern blue enamel oval title, gilt Crown to voided centre, the reverse impressed with maker's details 'J.R.Gaunt London' and with official issue number '3537'. Very good condition, complete with original buttonhole fitting, no enamel loss, minimal service wear.Height approx 28mm.