The description of these binoculars is written in cursive on its brass plates. This brass and bent shoulder model is apparently quite rare and made either in the late 1890s or early 1900s.This number is not in the usual place seen in later binoculars but is on the brass in the inner lower side of the right piece of the bino - last picture. Brass is black-ish in areas. There are 3 places to adjust - on the hinge and on the eyepieces.
Good clean lenses but I would add that they are a bit hazy. Since these are antique and the mechanisms/optics not as advanced as current ones I don't think it's bought for use but more to have/own as an item of historical interest for the avid collector. Feel free to ask any questions or clarify your doubts - although I'm not an expert.
If you'd like a closer picture of any part it can be sent. Please study pictures as they are of the item you'll receive. The item "Carl Zeiss Jena D. =10 with leather case" is in sale since Monday, July 20, 2020. This item is in the category "Cameras & Photography\Telescopes & Binoculars\Binoculars & Monoculars".
The seller is "promptdeals" and is located in Lancashire. This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Canada, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Egypt, Guernsey, Gibraltar, Guadeloupe, French guiana, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Martinique, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Kuwait, Panama, Qatar, Trinidad and tobago, Uruguay.