The handslide is interesting. It is a wide design, with 3.25 inches (approx 83 mm) between the tubes. The inner slide tubes are brass, and the stockings are made of what appears to be nickle oversleeves. The outer slide is brass with nickel oversleeves on both handslide braces. The mouthpiece receiver and bell tenon are constructed of nickel. There is no slide lock. It has a somewhat modern looking spring-loaded water key. Like the bell, all ferrules are nickel, and it too features decorative filigree on the slide bow.
It has an odd mouthpiece receiver somewhere between a modern medium/British/Euro, and a modern Bach/Morse/Remington large shank. Large shank mouthpieces don't fit, and Euro shank mouthpiece drop in but don't grab. It comes with a mouthpiece that fits, but it is not a trombone model. The cup diameter and rim is close to that of a french horn, with the depth of a trumpet. It is quite possibly an old mellophone or Wagner Tuba mouthpiece. The only thing "correct" about it is the shank, which seems to fit well enough, with a slight wobble, so still perhaps not perfect.
As to condition, for an old raw brass instrument it is in very good shape, with only a few dents and dings. It's been taken care of. There is no visible rot or verdigris. The slide is smooth but heavy and slow in movement as you might expect from an old model. There is only the slight odor of raw brass. A case is not included.
Until we know otherwise, the horn will be priced high. Photos will follow. If you have questions or observations about this instrument or model, please feel free to let us know.