The Fontainemelon 905 is a manual winding watch movement with a counterclockwise rotation. It features an intermediate wheel (B) which allows for a higher barrel by creating space between the directly driven sweep second (C) and the 4th wheel (A). This movement also includes automatic functionality and a sweep second hand. The Fontainemelon 905 was commonly used during the period of approximately 1950.

The Fontainemelon 905 features the following functions:

• Automatic Winding
• Sweep second