DUNCAN, GEORGE & SONS No. 301 (OMN) by Duncan, George & Sons/Pittsburgh-PA (Company Operated: 1874-1891), c1887 Introduced
NOTE: Sid Lethbridge 2020: ref Early Duncan Glass Tom Bredehoft

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Shape:Tumblers
Contributor: Brad Gougeon

Shape:Catalogue/Ads
Contributor: Courtesy of Tom Bredehoft, MAGWV

Shape:Tumblers
Contributor: Dennis Worden 3-13/16H x 2-11/16D

Shape:Tumblers
Contributor: Dennis Worden tumbler base

Shape:Tumblers
Contributor: Bailey L Crow