National Glass Company - Pittsburgh PA
  • Notes: 1899-1904 Originally made up of 19 Factories designated by number:1)Beatty Brady Glass Works (GW) 2) Canton GW 3) Central GW 4) Crystal GW 5) Cumberland GW 6) Dalzell Gilmore & Leighton GW 7) Fairmont GW 8) Greensburg GW 9)Indiana Tumbler & Goblet GW 10) Keystone GW 11) Model Flint GW 12) McKee & Bros GW 13) Northwood GW 14) Ohio Flint GW 15)Riverside GW 16) Robinson GW 17 Rochester GW 18) Royal GW 19) West Virginia GW 20) Cambridge Glass Co, built as a separate corporate entity

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