Beautiful Vacheron & Constantin "Uniplan" watch from the late 1930s. This has been professionally overhauled, though still runs about 90 seconds fast per day.
Strap attachment is opposite the usual, with female rather than male spring bars. Note that this watch is smaller than today's watches but was the typical size of watches for men in the 1930s. Today we might call it Mid-sized.
The caseback has an elegant curve to it in order to hug the wrist. 14k gold Art Deco buckle was custom made for this watch. I believe this watch falls in between the last two categories.People have asked about the band and mounting. This is not a simple process, and the spring pin bars are very hard to find in the right size. In addition, because of the lug design, you are limited in terms of the band thickness that you can mount. Only relatively thin bands, with the holes very near the end of the band, will fit this watch. Finally, the dial appears to me a refinished one and does not include "Swiss" at the bottom. It seems to be a good job, though as the photos show, it is breaking down somewhat. The item "Art Deco Vacheron & Constantin 14K rectangular watch" is in sale since Friday, December 11, 2020. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watches\Wristwatches".
The seller is "vorgeschichte" and is located in Princeton Junction, New Jersey. This item can be shipped to United States, Canada, United Kingdom, Mexico, Germany, Japan, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Uruguay.