The mounting flange in the back of the case is about 10 1/2. The case can use a polish. It has a silvered dial. The movement has an 8 day duration.
It has been running and keeping time. The serial number is 795173. Howard watham engine room balance wheel jeweled navy marine boat boston. The item "Large Brass 10 1/2 Chelsea Ships Bell Clock 8 Dial SN-795173" is in sale since Thursday, October 26, 2017. This item is in the category "Antiques\Maritime\Clocks".The seller is "rf132" and is located in La Grange, Illinois. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Colombia, Panama, 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, Peru, Pakistan, Paraguay, Reunion.