Vintage “Invar” Chronometer Pocket Watch open face, silver carved case, 51 mm. In diameter without the pendant, recent service, work Ok. Any defects not mentioned but visible in the pictures will be considered as described. Unless noted otherwise, our items are pre-owned and will have visual and physical cues typical of an item that has been used and handled. We work hard to identify all issues that we believe you would look for if you saw the item in person. Please be noticed that accuracy and water resistance are not guaranteed. Check out my other items.