The term 'Thomas of Timepieces' refers to Seth Thomas, an American clockmaker who founded the Seth Thomas Clock Company in 1813. He was known for his precision and accuracy in creating clocks and watches, and his company became one of the most successful clock companies in the United States. His clocks were used in many public buildings, including the US Capitol and the Supreme Court. He was also responsible for the development of the first electric clock in 1876.