There are 12 styles in the Westclox Dax Pocket Watch Style Series
Round bow, no second hand.
1910 - 1921
Round bow, second hand.
1928 - 1929
Oval bow, oval pendent
1929 - 1931
Oval bow, rectangular pendent
1931 - 1932
Metal dial, sunburst pattern in chapter ring
1932 - 1934
Vertical stripe dial
1934 - 1938
Metal dial with gray center, dial looks too small for case.
Made for about 6 months in 1938
Metal dial with light blue center
1939 - 1942
Radial numerals, pattern of small squares in center of dial.
1956 - 1959
Radial numerals, white dial background (no pattern in center).
1959 - 1962
Plastic case, oval bow. Red, gray or black. May or may not say Dax on the dial.
1971 - 1973
Plastic case, trapezoidal bow. (with or without second hand). Red, gray or black.
1973 - 1979 and ca. 1990
