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of French Walls, Smethwick
1832 Muntz metal, an alloy of copper and zinc, was already in use for sheathing boats.
c.1837 Muntz’s Patent Metal Company formed by the partnership of Pascoe Grenfell and Sons with George Frederick Muntz. The price of Muntz Metal was set to undercut the price of copper for lining the hulls of ships.
1849 Directory: Listed as metal rollers
1852 Patent granted to G.F. Muntz Junior for method of forming brass tubes without joint or solder for use as flue tubes in boilers; arrangement with Mr G.F. Muntz's Patent Metal, Sheath Bolting and Tube Co, French Walls, Birmingham for manufacture.
1862 Trials of Muntz metal for sheathing ships in the Royal Navy instead of copper had been successful and further quantities were ordered.