Thanks for the contribution. Whether research is empherical or based on speculation, which I have been guilty of myself, the most difficult aspects of this for me are the transition periods when one company merges with another, or as in the case of Coca Cola's transition from embossed bottles to painted labels, it can at times be quite confusing to say the least. Speaking of Coca Cola again, their first acls show up around 1955, and yet they were still making and distributing embossed only bottles as late as the early 1960s. Why? My answer to this is that major changes like this takes time. Time and money. It isn't something that occurs overnight to simply eliminate tens of thousands of bottles and replace them with new ones. Thus I "speculate" this may be the case with your Streator bottles. I'd love to see one of the actual 29S and 30S marks for my database. I only have a small handful of non-acls, and the only one of those that have an Owens-Illinois mark is the "Quality" I posted a picture of and spoke about here.
tftfan ~
Please be reminded that Owens Glass and Illinois Glass officially became Owens-Illinois on April 17, 1929. So that would eliminate your particular "Quality" bottle as being from 1927. So that leaves 1937 as the logical date. The nine is most likely a glass plant number. The list I have indicates #9 as that of Streator, Illinois. So we are back to celerycola's territory again. It's just one big circle that can make a guy dizzy. []
I realize the image below is in no way similar to anything being discussed here. I include it simply to illustrated that deco-style bottles were in fact still being made well into the late 1930s and mid 1940s. In this case we have a 1937 example. Granted, most deco-type (non-acl) bottles are from the 1920s, but not all.
I would love to see more makers marks from this transition period of about 1929 thru about 1934 when the first acls started to appear on the scene.
Thanks again to all,
SPBOB
Edit/Add ... Thanks, Morb. You beat me to the draw. While you were posting I was still typing.
The illustration shown below is how the majority of Owens-Illinois marks look, showing their various meanings. Althought there are exceptions to every rule, I think this illustration is as good as any to rely on.