Here is a good list from a militaria forum (source link provided):
http://www.usmilitariaforum.com/foru...howtopic=17086
(My Kudo's to the originator of this post for his research)
Gentlemen:
One of my collecting sidelines is USGI holsters. Over the years I have seen a lot of misinformation circulated on the identification of the makers of the M1916 holster for the M1911 and M1911A1 pistols. This holster was the most widely produced and, in my view, the most important US military holster of the 20th Century. It was in continuous use for seven decades, a remarkable achievement. I thought it might be useful to correct that misinformation and to supply those with a interest in the subject some new information as well. Accordingly, I have prepared a comprehensive list of all known manufacturers of US Government Issue M1916 Holsters. The list is posted below.
A couple of preliminary comments are in order. By design this list does not include private purchase holster makers, makers of holster models other than the M1916, reproduction holster makers, nor does it include inspector markings or dates. This list is confined to the identification of those manufacturers known to have supplied M1916 holsters to the Government.
The list identifies in all caps each manufacturer's marking which was required by the Government holster specification to be placed on each holster. To the right of each such mark I identify, where known, the complete name of the manufacturer and its location.
I believe that this listing is complete and accurate. However, if errors or omissions are noted I would welcome input to correct any such errors or omissions. Beyond that, several makers have eluded my efforts to identify them over the course of many years. Anyone with evidence of the proper name and location of those makers is invited to contact me.
Some of this information has never been published before to my knowledge. I hope that it proves useful to those here with an interest in the M1916 holster.
Regards,
Charlie Flick
WORLD WAR I
B.BROS. (Brydon Brothers Harness & Saddle Company, Los Angeles, Calif.)
BOYT (Walter Boyt Saddlery Co., Des Moines, Iowa)
CLINTON
HOYT (F. M. Hoyt Shoe Co., Manchester, New Hampshire)
G&K (Graton & Knight Manufacturing Co., Worcester, Massachusetts)
KEYSTON (Keyston Brothers, San Francisco, Calif.)
K.B. (Keyston Bros., San Francisco, Calif.)
W.H. McM. CO. (William H. McMonies & Company, Portland, Oregon)
PERKINS CAMPBELL (Perkins-Campbell Co., Cincinnati, Ohio)
ROCK ISLAND ARSENAL (Rock Island, Illinois)
SEARS (Sears Saddlery Co., Davenport, Iowa)
S.&R.
WARREN LEATHER GOODS CO. (Warren Leather Goods Co., Worcester, Mass.)
WESTERN MFG. CO. (Western Manufacturing Co., San Francisco, Calif.)
WORLD WAR II
A.L.P. CO. (Atchison Leather Products Co., Atchison, Kansas)
BRAUER (Brauer Brothers Mfg. Co., St. Louis, Missouri)
BOYT (Boyt Harness Company, Des Moines, Iowa)
CRAIGHEAD (John R. Craighead Co., Inc., Denver, Colorado)
CRUMP (Benjamin T. Crump & Co., Richmond, Virginia)
ENGER-KRESS (Enger-Kress Company, West Bend, Wisconsin)
FINK (Fink Leather Shops, Kansas City, Missouri)
G.P.& S. (Australian manufacturer)
GRATON & KNIGHT CO. (Graton & Knight Manufacturing Co., Worcester, Mass.)
HARPHAM BROS. (Harpham Brothers Co., Lincoln, Nebraska)
MILWAUKEE SADDLERY CO. (Milwaukee Saddlery Co., Milwaukee, Wisconsin)
JOSEPH H. MOSSER (Joseph H. Mosser Co.)
S-B CO
SEARS (Sears Saddlery Co., Davenport, Iowa)
TEXTAN (Texas Tanning & Manufacturing Co., Yoakum, Texas)
WALSH (Walsh Harness Co., Milwaukee, Wisconsin)
WARREN LEATHER GOODS CO. (Warren Leather Goods Co., Worcester, Mass.)
KOREAN WAR (For US Air Force Only)
BLOOMBERG LEATHER GDS.
BOYT (Boyt Harness Company, Des Moines, Iowa)
VIET NAM WAR
BUCHEIMER (J. M. Bucheimer Co., Frederick, Maryland)
BOLEN LEATHER PRODUCTS, INC.
BOLEN LEA. PROD.
CATHEY ENTERPRISES, INC. (Cathey Enterprises, Inc., Brownwood, Texas)
HUNTER CORP. (Hunter Corporation, West Minster, Colorado)
NORDAC MFG. CO. (Nordac Manufacturing Company, Fredericksburg, Virginia)