Marlboro Street Factory in Keene, NH manufactured dark green and amber bottle glass and was known for the manufacture of inkwells.

In New York and New Jersey, famous glass manufacturers of blown three-mold glass include the Mount Vernon Glass Company, Brooklyn Flint Glass Works, and Jersey City Glassworks.

Pressed glass is patterned only on the exterior and smooth inside.

Dating antique glassware video

The Coventry, CT Glass Company was also a manufacturer of three-mold items.

It is believed that glass factories in Pittsburgh, Philadelphia and Baltimore also produced three-mold glassware, but since excavation is not possible, no proof exists.

They were made by professional mold manufacturers in many large United States cities and were universally available.

Although no intact molds have been found, fragments of molds have been excavated at glass manufacturing sites in Sandwich, Massachusetts and Kent and Mantua, Ohio. It was made of hinged sections that could be opened and closed by means of a foot or hand operated treadle.

It was first called “Stiegel glass” by collector Frederick W.

Hunter because a few pieces of three-mold glass were included in his Stiegel collection.

Designs imprinted on whiskey bottles include political events, celebrities, the American eagle, horn of plenty, head of Lady Liberty, agricultural symbols and Masonic emblems.

A favorite whiskey bottle illustration was the head of George Washington under which was inscribed a text.

Tiny raised hairline seams where the mold sections were joined and a slight displacement in parts of the pattern are often seen on molded glass.