Lot Essay
ILLUSTRATED;
Hans Arnold, 100 Years of Precision Timekeepers from John Arnold to Arnold & Frodsham, Stuttgart, 1997, pp. 231-2, figs. 1-6
Hans Arnold, 100 Years of Precision Timekeepers from John Arnold to Arnold & Frodsham, Stuttgart, 1997, pp. 231-2, figs. 1-6