Vintage very rare Brutalist Gubelin watch. Reference G0710. Cuff style on stainless steel, 44 mm wide. ESA 9181 first quartz inside, working and keeping good time. The calendar disk has some dents on the inner part, and some dates not pass properly you must to pull and push the crown inside to center it. Other ESA9181 movement its included as future spares donor, donor calendar disc could be reprinted correctly and changed. Great piece for collectors. sold with the calendar fault described. Please study the pictures as part of description