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Above 2 photo's ACXM-1 prototype design. (1 of a series of special sci-fi era/mid century modern prototypes.)
Trombone Al Cass M-62 and M-1WR experimental models. Note because of the low profile of these trombone pieces, they are often mistaken as a trombone rim to trumpet doublers. Many first assume "trumpet mouthpieces" due to the unusual profile.
M-62 on left, M-1WR on right.
TROMBONE Experimentals M-62 on left, M-1WR on right. Raw brass.
JJ Johnson mouthpiece. J-1 later became the T-3.
J-1 tombone Shank & signature.
J-1 Trombone Cup
X-24 Experimental. May be an early Dizzy Gillespie. Appears to have more inscriptions that have yet been identified inscribed on the shank.
Appears to be a heavily tested experimental model. Patina has been partially removed for identification purposes. More info may become visible if cleaned further. Piece is signed.