A custom modified 5 Valve Bb with F extension built on an Yamaha 321 Bb horn corpus, serial # 001326, an ex-school horn. This horn has the factory stopping valve for stopping or transposition into A. It has an intermediate H tuning slide on the fourth (thumb) valve, which can be removed; The pinky fifth valve lengthens the horn into the Key of F which allows the player access to the few low notes missing on the Bb horn. It also allows for additional alternative fingering throughout the range of the horn. This is not a compensating Horn.  The F extension is fashioned in the Paxman style instead of the "Sansone "globe". The F extension has two separate tuning slides. For physical control the horn can be fitted with an Alexander Flipper and/or  an adjustable pinky hook for a small additional fee.  It has a factory lead pipe with amado water key. The horn is raw brass, no lacquer. There are signs of minor solder repairs, and dent raising in the horns life. Some small dents in inaccessible places remain.  Plays very well and is guaranteed to please, with a three day notification of return, Buyer to pay Ebay fees upon return. Shipped in a factory hard case. No mouthpiece. Buyer pays shipping based on location to be calculated by the USPS calculator for an 18 X 18 X 27 “ box at 21 pounds, insurance is included in shipping quote.   Check, MO or PayPal OK.