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A subsidiary manufacturing company called the Greenfield Copper and Brass Co was set up in Flintshire. This company took the copper from the Stanley works and reacted it with calamine to make brass. This was then used to make a wide variety of articles.
1787 The Meadow Mill factory was built at Holywell. It produced rolled copper sheets for the Greenfield Copper and Brass Company.
Owen Williams was a partner in the company during his father’s lifetime.
1814 Williams and Grenfell bought out the Greenfield manufacturing operation.