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of Water Street, Birmingham.
c.1807 Philip's son George joined the family business at age 13. On the death of his father on 31 July 1811 he managed the metalworks which the elder Muntz had established in Water Street, Birmingham.
1832 George Muntz gained patents for Muntz's metal, and for ships' bolts made of Muntz's metal.
1849 Directory: Listed as metal rollers 
1851 Due to the scale of demand, the "great copper sheathing works" were being operated 24 hours/day
1852 Mr Muntz was adding to his "immense" establishments in Birmingham and Smethwick with another works on the banks of the Grand Junction Canal and by the Stour Valley Railway to make copper sheathing as at Smethwick
The Water Street business was presumably later P. H. Muntz and Co