The coated lugholes mid-case, which I believe is a base metal of some sort, likely brass, shows honest wear with no visibly noticeable signs of oxidation. The outside of the all stainless steel case back is stamped "1053" while the inside of the case back is stamped "FOND ACIER" followed by INOXYDABLE. The Landeron 51 manual wind movement is clean, keeps accurate time and all chrono functions work as they should with the pushers having a pleasant catch and release feel. While the sweep seconds hand and minute register hand tend to reset back to precisely zero occasionally they will reset a smidge to the left or right of the zero mark.
After recently winding the crown 15 full revolutions the movement had an approximate 12 hour power reserve period. Given the movement's unknown service history and low power reserve a service is needed. This watch measures approximately 36 mm excluding the crown, approximately 41 mm including the crown and approximately 19 mm between the lugs.Case thickness, measured from the bottom of the case back to the top of the fixed bezel, is approximately 9 mm. Including the crystal thickness measures approximately 12 mm. Although the movement runs and keeps accurate time with all chrono functions working as they should, the low power reserve period indicates that a service is needed. As such there are no warranties, express or implied, attached with the sale of this watch. Vintage means old and while my personal belief is that old-school means better quality and workmanship, things can and do go wrong from time to time. For this watch that time is now. Any servicing costs going forward are your responsibility.
And please study the 12 high magnification pictures carefully, which were taken in natural light and from various angles, as they are part of the description and serve as an accurate representation of the condition of this watch. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Parts, Tools & Guides\Watches for Parts". The seller is "twooldsouls" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South Africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Republic of Croatia, Malaysia, Chile, Colombia, Costa Rica, Panama, Trinidad and Tobago, Guatemala, Honduras, Jamaica, Antigua and Barbuda, Aruba, Belize, Dominica, Grenada, Saint Kitts-Nevis, Saint Lucia, Montserrat, Turks and Caicos Islands, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.