The Apple Watch may be a wonderful smartwatch, but many analog watch lovers are note ready to give up their wristwatch for it. With this Dual Strap System, you can wear both an analog watch and an Apple Watch. It fits 38 mm and 42 mm Apple Watch models and SINN watches.
You get two shortened strap halves attached to each watch. Strap them together, and you will be able to a watch on each side of your wrist. More info is available here.