I bought it about 10 years ago. Last month, I still replaced the battery and gasket. Machine type: Quartz (monthly difference 20 seconds) Case material SS Case size 40mm (thickness 13mm) Caliber Cal-6771 belt width 20mm belt leather belt Material Alligator strap (marine) made by Camille Fornet, France waterproof daily life waterproof Weight: approx. 70g (including belt and buckle) Function Minute repeater Perpetual calendar until 2100 Moon phase Single hand split seconds chronograph There are no accessories. The chronograph has been confirmed to work. There is no problem with the month and date, but you may not be able to change the day of the week. For me, I didn't care about the day of the week, etc., because it wouldn't be a problem as long as I knew the time.