Joseph Manton died in. 1835. He went bankrupt in 1826 and Lang bought his gun inventory at that time. He was released from debtors prison in 1831 and went into business with his son making guns. After his death in 1835 the business persisted for several years. But I don’t recall much in guns made after 1838. There were multiple attempts to cash in on the Manton name by others for a very long time. Many guns made for export to India were marked Manton of various versions of the name.
In many ways this is like the Belgian Barkers, Parker’s, W. Richard not to be confused with the legit WRichards in GB, who was a real gunsmith, not a fake cashing in on a more famous namesake.
