For Aston Martin First Series tyres the 440/450x21 Lucas is recommended by Longstone Tyres.
History of the Aston Martin First Series
Built between 1927-1932, the Aston Martin First Seires was built with new financial backers at a factory in Feltham. There were a number of different models, covering sports and competition as well as tourer and saloon versions before the introduction of the Aston Martin International model in 1929 based on the company's racing cars of the day. The international was fast, but the high pricing lead to sales being slow.