The Seed VMF 5401 is the most basic version of the 5401: a microrotor, extra-flat movement, 30mm x 2.6mm, with a 48 hour power reserve, running at 21,600 vph. The rotor is tungsten, winding in one direction, and the balance is an adjustable-mass type (the eccentric weights are in gold). The basic 5401 caliber is time-only with no sub-seconds, but there are versions with a seconds subdial at 6:00, as well as 5400 and 5401 versions with openworked plates and bridges, big date displays, seconds subdial and date, and so on. All share the same basic movement architecture (one quick way to identify a movement and its derivatives is to look at the diameter, and the arrangement of the jewels and pivots of the going train, which tend to be conserved from one variant to the next).

Variations

• SEED VMF 5401 H,M (hours/minutes)
• SEED VMF 5401 H,M/S6H (hours/minutes/small seconds at 6:00)
• SEED VMF 5401/180 (skeleton)
• SEED VMF 5401/190 (skeleton with moon phase)
• SEED VMF 5401/40 (hours/minutes/big date at 12)
• SEED VMF 5401/50 (perpetual calendar)