Crystal door knobs with lock
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Antique Crystal Door Knobs : Crystal Door Knobs With Lock
Quote from Article entitled Antique Crystal Door Knobs:
Although the precise date of the use of crystal or glass for door knobs is not known, it is believed that they were first used at the turn of the 19th century when the manufacturing industry had undergone some technical advances. These advances allowed for the proper melting and molding of glass or crystal so they could be used in several different products. It is known that the technology for pressing glass that was melted or molten into different types of molds was invented around 1826.
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