TromboneChat

JohnL wrote: ↑Mon Jun 04, 2018 5:07 pm Here are the only published specs that I can recall seeing:

http://rouses.net/trumpet/olds39/olds39_13.htm

EDIT:
Here is the info converted to text:

TROMBONE MOUTHPIECES
No. 1-Large bore, deep cup, for bass trombone. 1-inch cup diameter and .250-inch throat.
No. 2~-Wide cup dance model. Medium shallow cup 1-inch in diameter with .246-inch bore. Excellent high-register mouthpiece.
No. 3-This is a mouthpiece of average proportions, furnished regularly on Olds trombones. Has ,984-inch cup, medium shallow, with .237-in. bore.
No. 4--Semi cushion, high-register "recording" model with .968-inch cup, rather shallow, and .237-inch bore
No. 5-Wide flat rim, .938-inch diameter, medium shallow with .234-inch bore. Excellent soloist model.
No. 6-Cushion rim model; narrow, shallow cup ,938-inch diameter and .242-inch bore. Extreme high-register model.

As far as small shank, Olds also produced a 1★, a 3C, and a 12C.
In large shank, there are:
15 - about 6.5AL size
20 - about 5G size
G - George Roberts model; about 1.5G size
21 - pretty sure this is the G rebadged after Olds and GR parted ways.

You might see a 10 or an 18 being sold as small shank trombone mouthpieces. The 10 is a baritone horn mouthpiece and the 18 is a baritone bugle mouthpiece.

There was a whole different sizing system up until around 1938 or so.

Trombone
No. 7 - For high register and solo playing.
No. 8 - Standard medium, as furnished with Olds instruments.
No. 9 - Special "lonq range" design, for featured players.
No. 10 - Medium bore with special muscle fitting rim for rapid technique.
No. 11- Large bore, for big tone and heavy volume.

From that era, I've also seen mouthpieces marked 8S, SYM, and N.V. (I suspect the last is someone's initials).

Notice that both systems have a size 10, but it's pretty easy to see which is which when looking at the mouthpiece.

JohnL wrote: ↑Mon Jun 04, 2018 5:07 pm
Here are the only published specs that I can recall seeing:

http://rouses.net/trumpet/olds39/olds39_13.htm

TROMBONE MOUTHPIECES
No. 1-Large bore, deep cup, for bass trombone. 1-inch cup diameter and .250-inch throat.
No. 2~-Wide cup dance model. Medium shallow cup 1-inch in diameter with .246-inch bore. Excellent high-register mouthpiece.
No. 3-This is a mouthpiece of average proportions, furnished regularly on Olds trombones. Has ,984-inch cup, medium shallow, with .237-in. bore.
No. 4--Semi cushion, high-register "recording" model with .968-inch cup, rather shallow, and .237-inch bore
No. 5-Wide flat rim, .938-inch diameter, medium shallow with .234-inch bore. Excellent soloist model.
No. 6-Cushion rim model; narrow, shallow cup ,938-inch diameter and .242-inch bore. Extreme high-register model.

As far as small shank, Olds also produced a 1★, a 3C, and a 12C