Four standing key hold number
Manufacturing Feature: Lead-Free Soldering
Key: Bb
Pipe diameter 18.5–19.5 mm
Caliber: 442 mm
Horn material: Brass
Piston cylinder/rotary valve: 4 units
Surface lacquer gold
Hold number HTA-385
Four‑key trumpet model
Manufacturing feature: lead‑free soldering
Key signature: Bb
Bell diameter: 18.5–19.5 mm
Mouthpiece opening: 442 mm
Bell material: brass
Piston barrels/rotary valves: 4
Surface finish: gold lacquer
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