Black case, white non-luminous dial: 1938 - 1942
Black case, black luminous dial: 1938 - 1958
Ivory case, brown luminous dial: 1954 - 1958
The style 1 Spur in black/Nickel replaced the Fortune model. The alarm shutoff was changed in 1940. After World War II, only black luminous was offered. Ivory luminous was introduced in 1954.