Vintage, Hamilton pocket watch, marked on the back side. The black face is marked "HAMILTON". The movement says Model 23 and 19 Jewels.The inside back of the case is stamped "KEYSTONE BASE METAL 90531". Copied from Adam Vintage dot com: The Hamilton Model 23 Military chronograph was introduced in 1943 and produced until 1956.
Among other more traditional uses of a chronograph, this watch was used in conjunction with a military Mark III Octant as a navigational tool. Unlike most of the Model 23 chronographs that can be found today, this piece is an official military issue chronograph. Military issue AN 5742-1, one of the most rare models. The item "Hamilton AN 5742-1 Model 23 Military Pocket Watch Chronograph Navigation WWII" is in sale since Sunday, March 11, 2018. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Pocket Watches\Antique".
The seller is "believeintink" and is located in San Diego, California. 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, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Russian federation, Israel, Mexico, New Zealand, Singapore, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion.