Starting with the New Wonder series, horns were identified with a number and a letter. In the case of the saxophones, the letter is "M" and there are a lot of numbers:

20M Straight Eb Sopranino (Conn called it an "Eb Soprano")
2M C Soprano
4M Bb Soprano, Curved
18M Bb Soprano, Straight
22M Conn-O-Sax
24M F Mezzo Soprano
6M Eb Alto
8M C Melody Tenor
10M Bb Tenor
12M Eb Baritone
14M Bb Bass
(16V Eb Contrabass Sarrusophone -- Conn's Eb contrabass sax replacement)

An even number was for a LOW pitch (modern intonation; A=440hz) horn. Odd numbers were for HIGH pitch (obsolete intonation standard; A=457hz). "H" or "L" is stamped by the serial number. High pitch saxophones cannot be made to play in tune with modern instruments.

Finishes were referred to by number. Especially note that the 0 was for standard gold-plated finish, the 00 was for the ARTIST'S SPECIAL gold-plated finish with "special" engraving (from about 30 different choices), and the 000 was for the VIRTUOSO DELUXE gold-plated finish with additional pearl key touches and custom, one-of-a-kind, engraving.

The patent number 1119954 and date (Dec. 8, 1914) are for the William S. Haynes patent for drawn toneholes. It's not when your horn was made.

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Below is a link-list of some offsite galleries and specific New Wonder links I've found. If you've got some info and want to list it here, drop me a line at thesaxinfo@gmail.com.

DoctorSax.biz	Matt Stohrer	Misc. Galleries	Misc. Info.
8M s/n 97782 (1922) Silver 6M s/n 188000 (1926) Nickel 6M s/n 199000 (1928) Gold 0 6M s/n 225000 (1929) Gold 00 6M s/n 238458 (1930) Silver 10M s/n 246000 (1931) Gold 6M s/n 246116 (1931) Gold 6M s/n 238458 (1930) Silver	1931 Warranty Booklet 6M Transitional Saxes Repairman's Overview Vids 1935 Sax Care Booklet Tenor Prototype	WWS: 00 and 000 Horns WWS: Our Finest 1923 16V Silver ca. 1923 16V Brass 1923 8M Gold Plate Virtuoso + Article 1923 8M Gold Plate Virtuoso 1925 10M Gold Plate	The Conn Microtuner Sarrusophone Fingering Chart Restored 16V Video Another 16V Video 50th Anniv. Sousaphone (Gold 00)