For standard trombone, T-1 model has the widest inside diameter, T2 Medium, and T3 smallest, Each has a different cup flow, but each as
the same cup depth.
I went to the old set I have, and see that the S1 is the largest, L1 is the MID, and J1 is the smallest.
Later, my father went and changed the model #'s I believe, due to the confusion. So now, the S1 is
the T1, the L1 is the T2, and the J1 is now the T3.(Well, of course these have not been made in at least
25 years.) The S,L, & J's were made in the 50s-60s. The T's came in the late 60s and through the 70s.
There are also bass trombones labeled #4, and #5. (#6 is a possibility).(these have traditional rims
with the bass trombone shank.)
There is also a Trombone rim to Trumpet shank, Trombone to French horn, trombone to cornet/fluegel.
(known as doublers.)
Hello Lex! I don't show anything at all for the L2. I may be mistaken, as it may be a mod, or custom,
and/or the 2 could mean something entirely different,(such as the 2nd? in a grouping(or set) made for
someone,), but I have the two original complete sets in the plexiglass original display cases, and there
is no L2 present. . Both of these sets show the S1, and L1, and J1. The L1 is the MID DEPTH model.
(later turned into a T2).(I have an S1 in the box, which has written on it in pencil at a later date(T1) and
a J1 box, which has written at a later date T3. (I do not have an L1 in an original box, but with the
process of elimination, that the L1 is the T2.<p> I think I should add, that my father had an agreement
with a large manufacture back in the 1960s, whom were making some of his designs. I am not sure what
they did make. I have never seen one personally, but know the story that it took him a year/two in
court to get his tooling back because legend has it more were made than he knew about, thus his
royalties were out of wack. There is a remote possibility, not having seen this piece, it may be one
of these? If I can find anything that has L2 written on it, or any notes refering to L2. I will update.
Thanks for asking this question in the forum, it will help clear up sizing for the trombone mouthpieces.
TROMBONE BASS 1
TROMBONE AL CASS MILFORD MASS T-3 J-1