ML bore.
Yellow brass bell.
Bell rim with wire.
Bell throat more open than TR-202.
Slightly darker sound.
Gold brass leadpipe.
Nickel silver outer slides.
Stainless steel pistons.
Thumb hook on 1st valve slide.
Fixed finger ring on the third valve slide .
Two-piece 3rd valve slide.
1 water key on main tuning slide.
Light rectangular case with rucksack assembly.
Silver plated.