Conn Baritone and Euphonium recognition guide

Here is a little table I made to help me identify Conn baritones and euphoniums based on the bell and valve configuration. I think I have most models in there. The table could of course be expanded, for example by including the position (up or front) of the small bell on double bell instruments.

Conn Baritone and Euphonium recognition guide
Valve Configuration Single bell front Single bell up Double bell, large bell front Double bell, large bell up
Front action 3 valves 10I, 14I, 20I, 50I 21I, 66I, 82I N.A. N.A.
Front action 4 valves 22I, 24I, 54I 25I, 86I 58I 74I, 90I
Front action 5 valves N.A. N.A. 30I, 60I 78I, 94I
Top action 3 valves 48I 64I, 80I N.A. N.A.
Top action 4 valves (None?) 84I 56I 88I
Top action 5 valves N.A. N.A. (None?) 36I, 92I