Frank Holton Revelation Trombone Lyre From 1922 vintage Brass Instruments

Description

Frank Holton Revelation Trombone Lyre.
A 1922 original vintage piece. I have the rest of the trombone and case but they are pretty dinged up which is why I’m parting it out. Does not Combe with the letter pictured, though the letter gives context to this.
Condition is "Used" and not perfect.
Thanks!