The left hand slide grip has two crossover tubes instead of one. Instrument has union label. Larson dated the instrument at 1900. Mouthpiece is marked York and Son. Silver-plated with gold wash inner bell.
Shield indicating union made is stamped on the valve casing near the serial number.
J.W. York and Sons Grand Rapids, Mi. Leadpipe at valves is .710. Also bears the union label. Estimated by contact to be no earlier than 1910 and no later than 1920. Estimated by contact to be no earlier than 1910 and no later than 1920.