A wonderful IWC (International Watch Co.) vintage automatic from 1956 🤘, in-house IWC Cal. 852 with 19800 A/h (2.75 Hz), fish symbol crown 🐟 (for water resistant), ca. 33.5mm, put in a modern style taste with a nice olive green strap 🫒 .
Read about the history of IWC the famous Schaffhausen 🐏 watchmaker ("probus scafusia"!); here.
Specs of the IWC Cal. 853 (which is almost the same as the Cal. 852); here.