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Pontil scar on the base of a free-blown glass bowl. A pontil mark or punt mark is the scar where the pontil, punty or punt was broken from a work of blown glass.The presence of such a scar indicates that a glass bottle or bowl was blown freehand, while the absence of a punt mark suggests either that the mark has been obliterated or that the work was mold-blown.
Modern bottles, when moulded, will be given marks on the heel (bottom) of the bottle. These marks serve a variety of purposes, such as identifying the machine used in the production of the bottle (for quality control purposes), showing the manufacturer of the bottle, how much to fill the bottle to, the date the bottle was manufactured, as well ...
Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
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The great majority of the company's production was in the form of glass bottles many of which were beer bottles, milk bottles, and many glass medicine bottles in a variety of standard sizes. Bottle collectors identify the company's products through the mould numbers and distinctive letter-in-a-keystone mark on the base of the bottles. [2] [3]
This mark is found on the bottom of most large pieces and on the base or stem of drinking glasses and compotes. Heisey glass is highly collectible and widely available in antique stores across North America and online auctions such as eBay. Popular pattern names include Crystolite, Greek Key, Empress, Plantation, Ridgeleigh, Stanhope, Old ...