There are two styles of key in this instrument. Plenty of the earlier style have showed up plated Wymondham - Hethersett. Recently i acquired one of the later type so marked. The keys were originally Soham - Barraway and i suspect they were plated and used between Newmarket and Warren Hill. At some stage Warren Hill was machined out and replaced with Chippenham Junc. Later still the instruments and tokens were reused between Chippenham Junc and Soham. One of the keys in the above photo clearly shows new engraving where Soham has replaced Newmarket on the key. What marvellous, well travelled keys they are.. Super Photo.