I. The Keyless Work
1 Main plate
The ETA 6497, 16½‴ Lépine calibre, 17 jewels, 21,600 vibrations an hour
1 Main plate
Fig. 1.
On the bench before you lie the parts of an ETA 6497, a hand-wound Lépine calibre of seventeen jewels. Your task is to put the movement together in the order the maker lays down, from the bare main plate to the hour wheel, and then to wind it and set it going.
Movement model: ETA 6497-1 complete watch movement, GrabCAD community. Technical data: ETA SA, Technical Communication CT 6497-2. Music: Mozart, String Quartet No. 19, K. 465, Andante cantabile, Musopen String Quartet (public domain). Set in EB Garamond and drawn with three.js. The typography follows George Daniels’ Watchmaking; this project is not affiliated with ETA SA or the Daniels estate. Source and full credits on GitHub.
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