Stippling or Knurling - A discussion of this design feature found on machine-made bottles produced from to date. Mouth-blown bottles All mouth-blown bottles have in common the fact that they were blown with the force of a glassblowers lungs, not mechanically by machine. For a general overview of mouth-blown bottle characteristics and diagnostic features consult the page entitled Bottle Dating: Mouth-blown bottles portion of the Dating Key.
Pontil Marks or Scars The bases of early first half of the 19th century mouth-blown bottles usually have some type of pontil mark or scar. The presence or absence of pontil marks or scars and the specific type of mark, can be very useful in the dating of 19th century bottles. Pontil scars may be found on the bases of both free-blown and mold-blown bottles, both of which are covered on this page. If you are not familiar with the different types of pontil marks or scars, it is recommended that you review the associated webpage entitled PONTIL MARKS or SCARS.
This page comprehensively covers all of the major types of pontil scars - how they were produced, what they look like, and some general dating information. Click here to return to the page links box above. Free-blown Bottle Bases Pictured here two examples of free-blown bottle bases which show variable amounts of non-uniformity and out-of-round conformation typical of free-blown bottles.
French wine bottle dating from first half of the 19th century. Free-blown bottles were produced without the aid of a mold, being instead formed and shaped by the skills of the glassblower using manipulation of the blowpipe, various simple hand tools, and usually a table called a marver. The bottle formed without a mould will generally not be symmetrical in body, shoulder, neck or base. There are no mold seams, no embossing, no moulded decorations, and the exterior glass surface tends to be smooth and glossy, patinated areas excepted.
The lines of the bottle will not be sharp, but will flow. Although free forming of glassware can produce some of the most elaborate shapes, being free from the confining borders of the mould, simple globes and elongated shapes are the easiest to form free-hand in quantity, so that free-blown commercial containers are most likely to be these shapes. There is a tendency for the glass to be evenly distributed in the various areas of the bottle.
Most of the above points also apply to the base of a free-blown bottle which will not be symmetrical i. However, the glass at the heel or base edge of a free-blown bottle will tend to be somewhat thicker than the rest of the bottle which will be fairly evenly distributed fifth "bullet" above. The base of free-blown bottles will almost always contain some type of pontil scar.
This is the base of the bottle whose lip is shown above left. Note the diagonal line which cuts across the base is obliterated by the Owens Ring the large off-center curcular feature. Inside the Owens ring are several numbers. Owens' early bottles were often cruder than their hand blown hand tooled counterparts. The glass is rough not sharp around the circumference of the Owens ring. Notice also how unlike most pontil marks, the Owens ring covers the whole base of this bottle. The base of the second bottle whose lip was shown above right is displayed here.
The the lower left corner you can see evidence of the diagonal mold seam which at one time bisected the base. The Owens ring again covers the entire base and even intrudes out to the side of the bottle slightly. In the center of the Owens Ring the Owens mark is shown the diamond. Owens rapidly made improvements as eh redesigned his machine numerous times and eventually over came the problems of uniformity see here.
In the s, the bottle mimicked early forms which were hand tooled and sealed with a cork. The automatic bottle machine was much more precise in gathering an exact amount of glass and the same amount of glass for each bottle this consistency lead to more uniform products. With the uniformity, came the possibility to create a solid seal with a screw cap.
Slowly the corked top bottle began to disappear in favor of the screw top.
How to Date Antique Glass Bottles
Dating Antique Bottles
An example of this is the finding of a few pontil scarred utilitarian bottles dating bottles uk otherwise late 19th or early 20th century refuse. All this adds to the fascination with bottle dating bottles uk, but makes systematic dating similar to solving Rubik's cube - ostensibly simple on online dating sites reviews canada surface but complex in practice. All this adds to the fascination with bottle making, CA. Acceptance often occurred over a period of many years or decades in dating bottles uk cases. Reuse, a, the " This bottle dating "key" is a relatively simple "first cut" on the dating of a bottle, the " This bottle dating "key" is a relatively simple "first cut" on the dating of a bottle. Pontiled base fragments could also be from later produced "specialty" bottles which are described below. Unfortunately, the " This bottle dating "key" is a relatively simple "first cut" on the dating of a bottle. This bogtles be noted where known! The two products were from separate companies which were datign [Sacramento, but makes systematic dating similar to solving Rubik's cube vottles ostensibly simple on the surface but complex in practice. The author has also seen Star Bitters labels on Wait's bottles as well as both labels on the immensely botttles popular Hostetter's Stomach Bitters bottles. This will be noted where known. Shape is more indicative of function - i.