Technical description: Silver-plated brass. 3-valve `Enharmonic' system valves: 1st and 2nd valves double with respect to 3rd. Windway leads from mouthpipe to 3rd valve, then via one of two alternative windways through 1st and 2nd valves back to the third valve, thence to bell. Valve type: 3 Périnet-type valves. Repair History: Legs of the main tuning-slide extended to lower pitch from Old Philharmonic.