Try the watch on your wrist. All it needs is your camera. Nothing to install.
1Open your hand, watch side toward the camera, 30–40 cm away2Wrist straight, sleeve pushed up, arm resting on a table3Turn your hand over to see the clasp
Keep your whole hand and wrist in the frame
Find even light
First hold the hand flat for a moment, then turn it once: the fit learns your wrist