Hand-Wound Openwork Watch

Timekeeping · contemporary model

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Hand-Wound Openwork Watch

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Case finish · Brushed steel

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How it works

Every visible component is built from procedural 3D geometry. No photograph, pre-rendered video or external 3D model is used.

The going train uses linked ratios, not arbitrary wheel speeds. The center wheel turns once per hour, the fourth wheel once per minute, and the escapement advances six times per simulated second.

Metal grain, leather pores, circular brushing and bridge finishing are procedural PBR approximations. This is an illustrative, kinematically driven caliber, not manufacturing CAD, a measured material scan or a torque and contact-physics simulation. Escapement contacts and the winding mechanism are simplified.

The 42-hour power reserve is a demonstrator parameter.

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Select the 3D view first; its outline shows that it has the keyboard. Space pauses or resumes the movement, E switches the exploded view, R resets the camera, L shows the part labels, and Esc closes the component card or releases the keyboard.

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10:08:36

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contemporary model · Timekeeping

Hand-Wound Openwork Watch

A mainspring, a going train of linked ratios, a lever escapement and a breathing hairspring behind open bridges.

A mechanical watch stores energy in a coiled mainspring and releases it in small, regular steps. This exhibit presents Caliber 01, an illustrative hand-wound openwork movement modeled procedurally for the museum. The mainspring barrel drives a going train of compound wheels and pinions, the escapement divides that motion into beats, and the balance and hairspring set the rate.

The wheels turn by linked tooth-count ratios rather than independent speeds. The 100-tooth barrel drives the 12-leaf center pinion, so the center wheel turns once an hour. The train then brings the fourth wheel to one turn a minute, and its 96 teeth drive the 8-leaf escape pinion, so the 15-tooth escape wheel advances in six releases per second: 21,600 beats an hour. Motion works reduce the minute rate 12:1 for the hour hand, and a two-mesh indirect train carries the seconds to the center.

The motion is kinematic. The escapement steps and the balance swings on a prescribed schedule, the hairspring’s deformation is drawn rather than solved, and pallet contacts and the winding work are simplified. The 42-hour power reserve is a demonstrator parameter, and the surface finishes are procedural approximations, not scans of a real watch.

Specifications

Movement: Hand-wound openwork caliber with center seconds
Going train: Center wheel 1 turn/h, fourth wheel 1 turn/min
Rate: 3 Hz balance, 6 releases per second, 21,600 beats/h
Scope: Linked gear kinematics; no torque, contact or amplitude model

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