Gold-plated stainless steel, 23kt
19 mm (inner side)
Can be worn on the finger or on a leather strap around the neck
How it works
1. Let the sun shine on the sundial.
2. Set the middle date ring with the hole to the current date.
3. Hold up the sundial and turn it to the direction of the sun, so that light shines through the hole.
4. The time will be shown on the inner side of the ring.