Serpent, 11 keys, Nominal pitch: C.

Technical description: 5-key model with 6 further keys covering tone-holes corresponding to finger-holes on the standard serpent. Wooden body covered in black leather, the bell angled forwards; brass crook, crook receiver liner, crook receiver mount, bell mount, stays and keys; ivory key-hole bushes. The crook is bent to an angle of c90°. The 1st, 3rd, 5th, 7th, 9th, 11th keys (numbered from nearest to mouthpiece receiver) are open-standing, the even-numbered keys closed-standing., L0: 2nd key. L1: 1st key. L2: 3rd key. L3: 5th key. R0: 8th key; 10th key. R1: 11th key. R2: 9th key. R3: 7th key. R4: 6th key. Keymount type: saddles. Keyhead type: flat round.