ROCHESTER TUMBLER CO. No. ..40 (OMN) tumbler by Rochester Tumbler Company (Rochester-PA, Company Operated: 1872-1901), c1886 introduced
NOTE 2023 - Shown in listing of three tumblers. No. 39 (rib optic); No. 40 (dot optic); No. 41 (diamond optic) and No. 42 (combination diamond and rib optic).
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Shape: Tumblers
Contributor: Jo Durrance - OMN 40 n the right. 3.5H, base 2.5D, top 3.25D. The one on the left is Rochester OMN 42.

Shape: Catalogue/Ads
Contributor: Sid Lethbridge - Butler Bros. 85th Trip catalogue which dates to 1886.

Shape: Research Update
Contributor: Sid Lethbridge

Shape: Research Update
Contributor: Sid Lethbridge