David Thomas was born in Middlesex in 1938 and attended Twickenham School of Art. He went to live in Stockholm where he worked for W.A. Bolin, the Swedish Crown Jewelers and found his way to silversmith Sven Arne Gillgren. After working for both he received a scholarship to study at the Royal College of Art in the UK and moved back. He registered his maker’s mark ‘D.A.T’ with the London Assay Office in 1959 when he arrived back in the UK and after graduating in 1961 he set up his own studio. Prior to making any of his jewelry Thomas would meticulously hand paint a technical drawing of the design giving exact dimensions to work which he kept excellent records of. His jewelry was similar to other notable names of the time period like Andrew Grima and John Donald yet with his own flare which pushed his designs internationally. By the middle of the 1960s Thomas was exhibiting his work in Australia, Zurich, The United States, and Japan. He opened a workship in Pimlico in London and took his daughter Jessie as a partner.