The most expensive Hamiltons when made were the 920 and Masterpiece. The Masterpiece was the 922 in fancier 18k or platinum cases and so marked. 1930's cost $685. Examples here of 1910 920 and 1938 922 with fixed bow. 920 with odd single hinge clamshell like an old English paircase. Both 14k solid. Competitors: Lord Elgin 190. Waltham Maximus. Second click to read 1916 catalogue.