Assembly-chromatic-

by US Cavalry

Edit

Assembly is another Bugle Call.
For 12 Hole Chromatic in C.

3 3 4  3 4 6 4
4 4 6  4 6 7 6
4 6 7  6 4 3 
3 3 4  4 4 4 

If it is more comfortable for you than you can change the 4 to a 5.
Both blown holes are, as you shurely know, the C.