It was bought by the prominent Brogden family and John Brogden, an important figure in the town's development in the late 19th century (who gave his name to John Street) simplified the name to "Sea Bank House".
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Such designs were inspired by the art of Hans Holbein the Younger, and were often copied from jewellery depicted in Holbein's portraits of Tudor ladies from the court of Henry VIII by jewellers such as John Brogden and his fellow worker, Carlo Giuliano.
In 1869, John Brogden died and his eldest son Alexander Brogden came to Tondu to take charge of the business and in 1872 formed a new company, the Llynvi, Tondu and Ogmore Coal and Iron Company Limited, for Brogdens’ Glamorgan business interests.