updated list as requested:
1-
SCOVILL MF'G CO WATERBURY (back ungilted) WWI (1850-1865 backmark)
2-
SCOVILL MF'G CO WATERBURY WWI (1850-1865 backmark)
3-
SCOVILL MF'G CO. WATERBURY CT. WWI (1870s-? backmark)
4-
SCOVILL M'FG CO. WATERBURY (ring of dots) 1902 (1860-1880 backmark)
5-
SCOVILL MF'G CO. * WATERBURY * 1902-1960? (1870s-1960? backmark)
6- WATERBURY BUTTON CO. * 1849-1965
7- WATERBURY BUTTON CO. *CONN.* pre 1965
8- WATERBURY COS INC CONN post 1965
9- W W W W (waterbury) modern
10- W.B. CO.
11- CITY BUTTON WORKS - N.Y.- WWI
12- CITY BUTTON WORKS- NEW YORK- 1877-1923 (moved to NJ 1923-55)
13- US PRODUCTS CORP
14- R. LIEBMANN MFG CO WWI
15 R. LIEBMANN MFG. CO.-NEWARK NJ- WWI-?
16- R.L. MFG Co Newark N.J. WWI-?
17- THE AUSTIN CO. PROVIDENCE R.I.
18-
HORSTMANN *** PHILA *** 1893-1935
19-
HORSTMANN PHILADELPHIA. * copper face- brass back overcoat size
20- N.S. MEYERS * NEW YORK * 1906-2000 (in business in NY)
21- AMERICAN BUTTON CO. *NEWARK N.J.* 1901-1920
22- AM. BUTTON CO *NEWARK, N.J.* 1902-1917
23- AMERICAN EMBLEM CO. UTICA N.Y. WWI
24- UNIQUE ART MFG CO. NEWARK, N. J. 1916-1952 approx.
25- THE ART METAL WORKS, NEWARK, N.J.
26- ART METAL WORKS I
NC -NEWARK, N.J.- 1902-1930 approx.
27- METAL SPECIALTIES Co. ATTLESBURG, MASS. 1940-1945 (painted black)
28- CHAS. FISCHER SPG. CO. NEW YORK WWII?
29-
FINE * QUALITY *
30- GREENWOOD CO * DETROIT MICH *
31- COL BUT WKS RUTHERFORD N.J. WWI
32- COLUMBIA BUTTON WKS*RUTHERFORD,N.J.* WWI
33- NEW YORK BUTTON WORKS WWI (found in France)
34- S & J WATERBURY CT. WWI (found in France)
35- STEELE & JOHNSON * WATERBURY CT * WWI (found in France)
36- JEWELERS PRODUCTS CORP. PROV. R.I. WWI (found in France)
37- SUPREME 172 QUALITY
38- REX PRODUCTS CORP * NEW ROCHELLE, N.Y. * 1902-WWII
39- D. EVANS & CO. * NO. ATTLEBORO, MASS. (red back) 1848-1945
40- D. EVANS & CO. N.A. WWI (found in France)
41- D. EVANS & CO ATTLEBORO FALLS WWI
42- * SUPERIOR QUALITY *
43- MADE IN ENGLAND (anodized aluminum front)
44- S. EISENER CO. RED BANK N.J. WWI (in business1859-1925)
45- SIGMUND EISNER RED BANK N.J WWI " " " "
46- Art in Buttons U S U. S. A. (vegetable ivory)
47- ? N.Y. (pressed vegetable ivory) war years
48- C KENYON CO. NEW YORK WWI- 1930
49-
BROOKS.BROTHERS *NEW YORK* ENGLAND 1902-1910.
50- L.A. MYERS. JR. INC. NEWARK N.J.
51- H.V. ALLIEN & CO. NEW YORK 1877-1948
52- DUSENBURY & SCHWAB INC. NEW YORK 229 4TH AVE.
53- LUXENBERG NEW YORK MADE IN ENGLAND
54- ROSENFIELD & RAPKIN * BOSTON, MASS.
55- WARNOCK UNIFORM CO *NEW YORK* (made from horn)
56- G J & F PARIS
57- H W I SCHWAB INC NEW YORK
58- THE J.E. MERGOTT CO. NEWARK, N. J.
59- JAMES C. DORAN & SONS PROVIDENCE R.I.
60- CORD 22
61- TIFFANY & CO. MAKERS ** M ** (14K gold blazer) 1907-1947
62- JACOB REED'S SONS * PHILA. * in business 1880-1983
63- A M & C
IE 23 M PARIS
64-
B.PASQUALE CO., S. FRAN., CAL. in business 1854-1970's
65- GEMSCO, N.Y.
66- SHIELDS INC. ATTLEBORO, MASS.
67- FINE QUALITY
68- ZELL PRODUCTS CORP. N.Y.C.
69- S.N. MEYER WASHINGTON D.C. in business 1890-1925
70- BADGER MFG. CO. RACINE, WI.
71-
JOHNSON * MILANO * WWI (made in Italy)
72- MARSHALL FIELD & CO. CHIC ILL
73- U.S ARMY STANDARD *
74- JACOB REEDS SONS PHIL.
75- HEIBERGER WASHINGTON
76- D. KLEIN & BRO PHILA. PA. (copper)
77- E.A. ARMSTRONG MFG. CO. CHICAGO
78- KREMENTZ LIBERTY BRONZE
79- J.R. GAUNT LONDON
80- L.&R. METAL PROD. N.Y
81- CHESHIRE BUTTON * CT. USA *
82- L & R MEDAL PROD. N.Y.
83- MAURICE BOURDON
PARIS
84- *
(vegetable ivory) WWII
85- WOLCOTT MF'G CO. PROVIDENCE RI. in business 1906-1922
86- PAT. 54296 RENEWED '35 rare 1935-46 manufacturers error of 1919 patent
87- ATTLEBORO
88- (blank)
89- ARNSTEIN SIMON & CO. * S.F. * WWI
90- TAUNTON PEARL WKS. TAUNTON 1912- ?
91- HANDY BUTTON MACH. CO. * CHICAGO * tin-backed
92- HANDY BUTTON MACH. CO. * NEW YORK * tin-backed
93- GOLD PLATED * * *
93-
LIBERTY MFG. CO. LOS ANGELES CAL. PATENT PEND. locket button WWII
Tony, is there a dot after PHILADELPHIA before the star?
Is your HANDY MACH. CO. button also a tin back? (ferrous)
New backmarks added in red.