Instrumental Duet E-Flat Tuba TC,Instrumental Duet - Level 3 - Digital Download SKU: A0.1101417 By Alexander Simon Cottrell. By Alexander Simon Cottrell. Christmas,Traditional. Score and parts. 23 pages. Mr Alexander S Cottrell #704805. Published by Mr Alexander S Cottrell (A0.1101417). We wish you a merry Christmas with a twist, written for two tubas . Part 1 in Eb Bass TC, Tuba in BC, Part 2 in Eb TC, BC and Bb TC,.