Dugan Glass Co. (1904 - 1913)
Diamond Glass Co. (1913 - 1931)
Click on picture for descriptive text
Dugan Glass / Diamond Glass Company, Indiana, PA
In 1892, Indiana Glass Company was formed in a town of Indiana, PA.  The plant was short lived, and was later acquired by Harry Northwood.  Following the Northwood production, the plant was reorganized by Thomas Dugan, and continued producing glass, starting with carnival glass in about 1908.  Thomas Dugan continued his association until 1913, when the plant was reorganized as Diamond Glass Co. Most famous for their peach opalescent glass, the company continued production until 1931, when damaged by fire, it was never rebuilt. 

   The old Dugan moulds have been acquired by the LG Wright Company which continued issuing many reproductions in carnival, opalescent and pressed glass. Watersets were among the most heavily reproduced, including the patterns of Beaded Shell,  Heavy Iris, God & Home and Dahlia.  Although the early tumblers are most often found in marigold; purple, blue and white examples can sometimes be found. Green is a very scarce color in Dugan/Diamond production.
Adam's Rib
Pastel Green
Beaded Shell
Amethyst
Beaded Shell
Blue
Beaded Shell
Marigold
Circle Scroll
Marigold
Dahlia
White
Circle Scroll
Purple
Dahlia
Marigold
Dahlia
Purple
Floral & Grape
Marigold
Floral & Grape
Amethyst
Floral & Grape
Blue
Floral & Grape
White
Grapevine Lattice
Amethyst
Floral & Grape
Marigold over smoky
God and Home
Blue
Grapevine Lattice
Marigold
Not in author(s)
Collection.

Your picture depicting this tumbler pattern and color combination is most welcome.
Grapevine Lattice
White
Grapevine Lattice
Clambroth
Grapevine Lattice
Blue
Grapevine Lattice
Light Blue
Dugan/Diamond - R - W
Dugan/ Diamond - H - Q