 The fourth period began in the early 1930s, and is characterized by the Streamline Moderne influence on the styling of the cases.Many of these watches featured a new 207 movement, 12/0-size with 17 jewels (of which only 40,000 were made) and included such sleek designs as the Futura, Chesterfield, Wentworth, Andover, and the 14kt Rockliffe.Many of these are very similar to watches made at the time by the Hamilton Watch Company.