The Hamilton 78 watch movement is a sophisticated excenter self-winding mechanism with just one gear stage. This movement is used in automatic chronographs with functions including a 60s, 30min, and 12h chronograph, cam switched. The movement does not feature a manual wind function. The day display is quickset by repeated pushing the crown, offering support for two languages. The date display is also quickset. The period of use for this movement is from 1976 onwards.

The Hamilton 78 features the following functions:

• Automatic chronograph, 60s, 30min, 12h, cam switched
• Automatic Winding
• Calendar
• Chronograph Movement
• Date: quickset
• Day and Date Display
• Day: quickset by repeated pushing the crown, 2 languages
• No Manual Wind