Bottle dating guide
The “H over smaller A” mark is stated to have been used beginning in 1923, according to patent/trademark information published in “400 Trademarks on Glass” (1968) by Arthur G. The Hazel-Atlas mark sometimes varies slightly in exact appearance, especially on small bottles where there was little room to engrave the mark into the mold, but in general it is quite easily recognizable on the majority of glass items.The “H over a smaller A” is probably the second most-commonly seen manufacturer’s mark on glass containers found in typical bottle dumps / trash deposits of the early 1920s to the late 1950s or very early 1960s period, behind the ubiquitous Owens-Illinois mark (i.e.I am developing this webpage due to my frustration with the lack of information about collectible Pepsi bottles on the internet.
Hazel Glass Company, Washington, PA (began 1887) and Atlas Glass Company, also of Washington, PA (began 1896) merged to form the Hazel-Atlas Glass Company, Wheeling, WV, in 1902. (In my own opinion, it is likely, or at least very possible, that the “H over A” mark continued to appear on some containers produced after 1964, since a very large number of molds were then in use, and it would have been a considerable endeavor just to make minor re-tooling changes on all of those molds to erase or replace the makers mark.) Tremendous numbers of white milkglass liners (the miniature round glass plates or “saucers” that fit inside zinc screw-threaded lids made for Mason-style fruit jars) were produced, as well as canning jars (fruit jars) including the jars for general household use; “packer ware” (generic containers for a multitude of common food products such as mayonnaise, spaghetti sauce, mustard, jams and jellies, coffee, peanut butter, applesauce, etc, as well as non-food items like cosmetics, salves, medicines, chemical liquids), as well as a wide variety of other containers for products of every description.
Ovide was produced in many of the Platonite colors, especially into the 1950s.