also the suction scar on the base (point #5 above and picture to the left) can date no earlier than 1905 and are usually post-1910. Though patented and first used to a limited degree in 1903, the first Owens Automatic Bottle Machine licenses were granted to other manufacturers in late 1904 making 1905 the effective “beginning” (i.e., terminus post quem) date for bottles with all of the above listed machine made diagnostic characteristics (Miller & McNichol 2002). Bottles which have all the primary characteristics noted above (#1, #3, #4) rather than the suction scar (#5) were produced by non-Owens automatic or semi-automatic machines and are somewhat harder to precisely date, though the vast majority post-date 1905 also.
Blowing air might have been supplied by the latest hose pipe visible from the the top the new group of strike shapes left, where in fact the finally “blow” an element of the stage took place
It should be noted that one fairly early press-and-blow semi-automatic machine was designed to produce narrow exercise bottles. Continue reading What this type of Symptomatic Keeps Indicate: Bottles because of the detailed top machine-generated services (#step one, #3-#5)