Dating duraglas bottles
Dating duraglas bottles - dating love site to india
At left is "7" at right is "0" at bottom is "9"Manufacturer mark indicates it was from Factory 7 in Alton, Illinois (1930-Today). The Owens-Illinois Glass company was the result of a merger between the Illinois Glass Co. At center is the letter "I" in a circle in an enlongated diamond.
General Machine-made Diagnostic Features: Machine-made bottles will exhibit most or all of the diagnostic characteristics explained and illustrated below.It has mesurments on the side black lid with dark liquid still in it.Also an 'Old Quaker' half pint glass bottle with lid. Thank you much for any help."--It's a common enough bottle that it merits a response to help others.The offset is a function of the orientation of the parison relative to the two molds (parison and blow molds) used on the particular machine, or occasionally, to the hot parison "sticking" to the neck ring of the parison/blank mold when transferring to the blow mold (Ceramic Industry 19-15).There are also no horizontal tooling marks present on the finish and/or upper neck as would be observable on the finish of mouth-blown bottles.2.These are faint, somewhat wandering, hairline seams which if present (usually) are sporadically visible on the sides of machine-made bottles.
The ghost seams are caused by the parison mold parts and if visible enough will be "attached" to the vertical seams in the finish.On many early (very early 1900s into the 1920s) and occasional later (1930s and later) machine-made bottles the vertical body/neck and finish mold seams are discontinuous and offset from each other; click offset seams for a picture of this attribute.These vertical seams - finish mold seams vis--vis the upper neck mold seams - may range from just slightly offset to 90 degrees offset (like shown at the linked image above). and the Owens Bottle Co merged and became the Owens-Illinois Glass Company.I recently received this inquiry:"dug up bottles on property, about 40 clear glass but want to know what this duraglas small bottle with a roman numeral which looks like a 3 followed by an IV.Feature #7 describes a couple glass related features that are quite consistent in machine-made bottles, but not diagnostic, i.e., mouth-blown bottles may sometimes have few/no bubbles in the glass and even thickness.