FLAT IRON (AKA) by Adams & Company (Pittsburgh-PA, Company Operated: 1861-1891), 1886 Introduced
NOTE: Extensively reproduced by L.G. Wright.
NOTE: Sid Lethbridge - You will have to make your own decision based on personal observation. So far no one has suggested a way to detect the differences between original and repro.
NOTE: Ref: Victorian Glass Novelties by Jo & Bob Sanford, pg. 126. Original colors uncertain but would likely have been amber, blue, canary and clear. "Apple Green" would be a possibility.
NOTE: The examples we show here may or may not be originals.
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Shape: Research Update
Contributor: Sid Lethbridge

Shape: Catalogue/Ads
Contributor: Sid Lethbridge

Shape: Novelty Figural
Contributor: Shelly Humwood (1,3), Ingrid Stroud (2,4), Michele Richard, Anne Gross Beal

Shape: Butter, Cheese, & Honey Dishes
Contributor: Sharon Caldwell (1,2), Haileta Willing, Bob Mason

Shape: Catalogue/Ads
Contributor: Sid Lethbridge