Jens was 60 when he started constructing the clock, but the story starts when he was only 25. In Strasbourg, the young locksmith saw an astronomical clock with a perpetual calendar in a cathedral.

Astronomical clock, made by Samuel Watson, London, about 1695. in ebonised case with one cranked winding key and two door keys. Astronomical clock, made by Samuel Watson, London, about 1695. in ...

If the workings of a mechanical timepiece give you a thrill, prepare to be blown away by this over-the-top astronomical clock. The horological masterpiece, which was designed by [Mark Frank] as ...