This is a new Miraphone rotary valve Eb tuba, model Norwegian Star. Condition is new, unplayed, except it was damaged in shipping. The bottom bow had a medium dent. It's mostly repaired, but a small amount won't come out due to the stiffness of the nickel bow guard. It's not a big deal.
Photos below are of this exact instrument. Optional gig bag shown.
Specs
283B "Norwegian Star"
bell diameter 400 mm (15,748 inch)
body size 5/4
without lyre holder or strap ring
5 rotary valves, 5th valve flat whole step
bore of valve section conical 19,6 - 21,2 mm (0,772 - 0,835 inch)
adjustable thumb ring
material of mouthpipe gold brass
mouthpiece TU17