Diamond Glass Company, Royersford, Pennsylvania

Diamond Glass Company

Royersford, PA (1885-1990)

Diamond Glass Company of Royersford, Pennsylvania produced a wide variety of containers throughout their long history.

(Please click here to see an early Diamond Glass bottle catalog posted on Tod von Mechow’s great informational site on antique soda and beer bottles.)  Note: the original long URL was shortened through the tinyURL.com site :   Diamond Glass Company catalog.  This catalog is circa 1900-1905, and indicates that many of their soda bottles were marked with style or mold numbers on the base, but with no manufacturer’s mark.    A few bottles are marked with a plain diamond,  or “D.G.Co.”.

Most bottles found in the United States with a diamond marking (but no letters or numbers inside) embossed on the base or heel of the container can be safely attributed to Diamond Glass Company of Royersford.



Note: There are no doubt a few bottles in existence (marked with just a plain diamond) which cannot be attributed to Diamond Glass Company with 100% certainty, simply because Illinois Glass Company  produced bottles with an “I in a diamond” and on some examples the letter ‘I’ is invisible or barely discernible.   However, the chances are good that any particular bottle with just a plain diamond marking was indeed made by the Royersford concern.  Bottles with numbers, or a number/letter combination placed within the diamond are considered to be products of Illinois Glass Company.

Diamond Glass Company was purchased in 1985 to become part of Diamond-Bathurst, and in 1987 the factory was  acquired by Anchor Glass Container Corporation, who closed down the plant in 1990. (Some more background info on Anchor Glass Container Corporation is on my webpage about Anchor Hocking Glass Corporation,  here).

Below, the typical “plain Diamond” mark as seen on the heel of more recent bottles………..this is on a clear glass non-returnable soda bottle made in 1986.

Diamond Glass Company, Royersford, PA soda bottle

Diamond Glass Company, Royersford, PA clear soda bottle, made in 1986. Diamond mark on heel, with ’86’ date code positioned to the left.


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8 Responses to Diamond Glass Company, Royersford, Pennsylvania

  1. Tom Lewis says:

    IN 1958 or so I was a classmate of a daughter of the Leroux liquor family. As a class trip we toured the Diamond glass factory in Royersford. I always thought we got in special because Leroux bought their bottles from Diamond. I have vivid memories of the bottle blowing machines and to his day I believe that that tour was the single most thing that made me want to aspire to a career in manufacturing. Most of my adult life was spent in food manufacturing management, and I trace it to that day.

    For years I looked on the bottoms of bottles to see if they had the diamond. I remember on the tour that we were told that Diamond made all the bottles for “Vitalis” hair tonic. Who remembers that?

    Tom Lewis

    • David says:

      Hi Tom,
      Thank you very much for your interesting post! I love this kind of background info! I don’t know anything about the Vitalis hair tonic bottles but I would guess they were not marked with the Diamond Glass Co. logo (as many “private mold” bottles were not marked to show who actually made them for the company that sold the product contained in the bottle).
      Perhaps someone will comment further. Take care,

  2. Deanna McKeeham says:

    I have a glass salt and pepper set. On the side it says complements of Diamond Glass Co. Royersford PA The bottom has a diamond. No numbers. Do you have an idea when it was made or why Diamond Glass Co. would of handed them out?

    • David says:

      Hi Deanna,
      I have no idea on date, but it sounds like a nice souvenir item to help advertise the Diamond Glass Company. Maybe someone with more background information on your salt and pepper set will land on this site, and help us with more details on the set.
      Best regards,

    • Bob Good says:

      We had a whole case of the shakers at home when I was a kid. We never used them and I wonder if my dad still has them somewhere. He worked for Diamond Glass in Royersford through the 50s and early 60s. I remember going there with him and seeing the machines blowing bottles faster than you could watch. The shakers were made to give away to tour groups and sales samples.

  3. tduro tduro says:

    I found a pint flask clear bottle that says FEDERAL LAW FORBIDS SALE OR REUSE OF THIS BOTTLE on the side. Maker’s mark is an empty diamond. Above the diamond is a number 4. To the left of the diamond is the number 18. To the right of the diamond is the number 65. Below the diamond is R-44. I thought it might be an Owens Illinois bottle from 1965, which would fit with the FEDERAL LAW FORBIDS…, but that doesn’t fit with plant code 18. I haven’t been able to find anything on R-44. I’m assuming it’s a rectifier code, but can’t find any info on it. My next guess is Diamond Glass Company 1965. Anyone care to offer an opinion?

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