F Tuba "Belcanto-Solo" F-381B, by MIRAPHONE
model 381B "Belcanto - Solo"
bell diameter 420 mm (16,535 inch)
443 Hz
5/4
without lyre holder
without strap ring
4 rotary valves
bore of valve section conical 19,6 - 21,2 mm (0,772 - 0,835 inch)
spiral spring system
vented valves for pressure compensation
bell and bottom bow are made from thinner brass sheets
nickel silver wreath
leadpipe tubing wraps directly around the mouthpiece shank
leadpipe soldered onto the bell
material of mouthpipe gold brass
mouthpiece TU27