The old model number is CTR-506, performance trumpet.
11.7 mm(0.460 in) bore.
127 mm(5.000 in) soldered wire rim yellow brass STANDARD/THIN bell.
Sterling silver leadpipe.
Reversed light weight main tuning slide.
Yellow brass inside/outside tuning slides.
1st valve slide ring.
3rd valve slide fixed finger ring with stop screw.
Deluxe multifunctional carrying bag, 3C mouthpiece, cleaning cloth, cleaning rod, valve oil.
Added parts:
1 square main tuning slide.
3 super thin finger buttons.
3 light weight valve springs.