Seed VMF 5401/50

Extra-thin perpetual calendar with micro-rotor

Basic information

Slender and robust, refined and elegant. Powered by the Seed VMF 5401 specially designed to receive additional mechanisms available on the market, this  module has a perpetual calendar and is only 4.2 mm thick. Calendar hand at 3 o’clock, 7 days with hand at 9 o’clock. 12 months with hand at 12 o’clock, moon phase in window at 6 o’clock. Leap-year indicator at 12 o’clock.

> From 10 pieces in its Seed VMF 5401/50 version, with personalisation of the oscillating weight.

> From 150 pieces in its S-VMF 5401/50 version, with personalisation of the bridges (shapes and decorations) and of the oscillating weight.

Detailed features

Functions & Complications
Self-winding - perpetual calendar
Main dimensions
Fitting of 13 ¼” (30.00 mm)
Thickness of 4.2 mm
Power reserve
48 hours
Number of components
3 Hz (21,600 V/h)
Type of balance
Variable inertia with gold inertia blocks
Type of stud-holder
Type of balance-spring
Type of oscillating weight
Off-centre/Tungsten micro-rotor
Oscillating weight winding direction
Single direction, in anti-clockwise sense of the weight, viewing from the dial side
Variable inertia balance
Rapid rotation barrel
Specific features and finishes
Fine-brushed and rhodium-plated plate dial side, skeleton
Fine-brushed and rhodium-plated bridges, skeleton, hand-finished
Bicolour engraving
Counterbores and apertures diamond-polished
Ceramic ball bearing
Wheels circular-grained on 2 faces
Flat-head screws, locked
Pivots and flanges rolled