Bottle dating guide
Avoid search engine results that say " How to Collect Old Coke & Pepsi Bottles "Meanwhile, I am still looking for accurate information to place on this website.
BLOB TOP (also referred to as "pony") soda bottles were sealed by a cork inserted into the mouth of the bottle.
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.
Codes on bases of H-A bottles: Many of the Hazel-Atlas containers I have seen do not conform exactly to this chart, but this might be of some help in interpreting the markings on of their products.
This chart is probably from a trade publication of the 1950s: Chart of Hazel-Atlas base codes on containers, courtesy of