Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the watch_generator zip.

Usage

1. Open the Watch tab in the 3D viewport sidebar (N). With no watch selected, click the picture to choose a preset and press Add Watch; it appears at the 3D cursor. You can also use Shift+A, Mesh, Watch.
2. With a watch selected, the preset gallery switches the whole design. Surprise Me makes a new random watch, Variation changes the current one a little and Reset restores the preset.
3. The main choices (type, case shape, metal, dial color, strap) sit at the top. The closed sub-panels hold every detail: Case, Bezel & Crystal, Dial, Hands & Time, Strap, Movement and Screen.
4. Hands & Time: set the time shown, use the current time, or pick Sweep or Tick and play the timeline to animate the hands.
5. Strap: choose On Wrist or Laid Flat. Laid Flat suits product shots on a table.
6. Delete removes the watch with all its parts.

The watch is built at real size (a 40 mm case is 0.04 m), so frame it with a long lens and a close focus distance for macro shots.