A nice vintage gold plated Lanco 🔔 from the 60's with a mechanical Lanco Cal. 806 integrated in the watch case (very thin) and coming with a cool flex strap ("Robusto").
Specs of the Lanco Cal. 804 (806 is similar and has just the sub-second added); here.
If you want to read more about Lanco history (Langendorf Watch Company SA); here.