Antique H. N. White Trombone and Case

　　I don't know much about trombones. I bought this at an auction recently. It's "The King" made by The H. N. White Company of Cleveland, Ohio. Patented on May 17, 1910. Model #87577. It's medium bore, low pitch, silver colored. I don't know the key or type of trombone it is. The horn is engraved. (See photos.) Included is the original case, mouthpiece and a sheet music clamp. The case measures 36.5 inches by 10.5 inches. It is pretty beat up from years of use and the handle (which is included) is broken off. The trombone has some dings and scratches and could use some cleaning and polishing. (If one polishes their trombone.)If you have any questions, please ask. And I combine shipping.