For more info with a more extensive, detailed chart of known Owens-Illinois plant location codes, please check out the article by Bill Lockhart and Russ Hoenig at this URL: The Bewildering Array of Owens-Illinois Glass Co. Also, I disagree with at least one other statement on that page, such as this one: If the manufacturers mark found on the base of the bottle is the diamond IO mark (see Figure 2), then the bottle was produced pre-1954. This may be so in most instances, but the statement is not really true since many, many Owens-Illinois bottles made after 1954 continued to bear the old (Diamond/I/oval) mark. Im simply not sure about the interpretation of the base numbers in the case of your water bottle. This is an in-depth overview of the history of this important 20th and still Its probably a style or catalog number that was assigned to that particular bottle design or shape. Hope this helps! Since there is NO dot, presumably this is from 1951? Rick Owens DRKSHDW long-sleeve rib-trimmed hoodie price in Egypt Any ideas on date/orgin? I have a Duraglas bottle-quart size-with the Duraglass logo on the bottom along with 17 top left- 51 top right- a capital A in the middle left. To the left of the logo is the number 4, to the right, the number 6 and the on the bottom, the number 6. Federal law forbids sale or re use of this bottle.. It is hard to say for certain. R in a triangle mark used by Reed. several times and not found any printed date within. Curious what the F stands for I believe its 1958 bottle ,mold number 19. I will post a photo of representative examples William Franzen & Sons- W F & S MIL marking on base of amber beer bottle. USD 5.50, USD 7.00 David, Hey David, I found this bottle today on the bottom of the bottle it say This bottle base has 1949 date code to right. I live in south eastern Pa and came across this Owens Illinois bottle. Best regards, David, Hello David, Any idea what the date of manufacture could be? marks on antique bottles & fruit jars (Mississippi, Missouri, Modes), Milk Glass~ Vintage Cold Cream, Salve & Ointment Containers, N in a square mark Obear-Nester Glass Company, East St. Louis, IL, New Albany Glass Works, New Albany, Indiana (1867-1872), Newark Star Glass Works, Newark, Ohio (1873-1904), Ohio Valley Glass Company, Pleasant City, Ohio (1902-1905), Owens Bottle Company (O in a square mark), Reed & Company, Massillon, Ohio (1881-1904), Rawleighs W. T. Rawleighs / Freeport, Illinois, Robin in Tree childrens mug Bryce Brothers & Mosser Glass Company, S G mark on glass containers Saint-Gobain / Verallia, Southern Glass Works, Louisville, Kentucky (1877-c.1885), Surname-oriented Antique Bottle Collecting, Target Balls (Antique Glass Target Balls), Thatcher Glass Manufacturing Company (c.1904-1985), Vaseline Jars / Chesebrough Manufg Company, Wax Sealer Fruit Jars List of Primary Markings, Whitall Tatum Company, Millville, New Jersey, Whittemore Boston U.S.A. / Antique Shoe Polish Bottles, WEB LINKS to some other sites / other interests (Not glass-related). https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=Bottle+%22G-18038%22&_sacat=0&LH_TitleDesc=1&_osacat=0&_odkw=Bottle+%22G-18038%22 2) I have a green 4 OZ jar marked with the old trademark and a single digit 1 but with NO dot discernable, although there is a general stippling on the base.