What I built
An interactive exploded-view study of the Valjoux / ETA 7750 chronograph movement. Four subsystems — calendar and dial-side works, going train and escapement, cam-and-lever chronograph, and automatic winding — separated, labelled, and inspectable in 3D. Geometry is procedurally generated from watchmaking forms rather than imported CAD. Five guided focus presets, an explode slider, subsystem filter, dark blueprint mode, and live gear train animation showing the 4 Hz escapement tick and reduction path.
Why I built it
I won an Omega Speedmaster Reduced 39mm at auction. The 7750 runs inside it. I wanted to understand the architecture — not just that it uses a cam-and-lever instead of a column wheel, but what that looks like in three dimensions and how the four layers relate to each other. The same base movement powers the IWC Da Vinci Perpetual Calendar (ref. 3750, 1985), which is accurate to the year 2499. Building the exploded view was the way I closed the gap between knowing the story and understanding the thing.