Thomas Mercer Chronometer St Albans England with certificate NR nautical clock. From original owner's collection. In excellent shape. Was calibrated in the 70's as noted on the certificate. I do not know how to date this item but it is certainly vintage if not antique. I can add more pics if needed. If you can tell me how to date the item, I will do so and include that information in the auction. Low starting bid with no reserve. I know very little about these i...tems but presume it to be in good working order. I believe it is a 2 day model. Will be packed with utmost care. Local pickup in the Chicago area is welcome. Please ask questions if needed. If you know these items, I would be happy to share your expertise as well as educate myself. Selling for my company so I just want a fair deal for both of us. On Jul-30-20 at 04:56:42 PDT, seller added the following information:From what I can see, the serial number is 341 c. I will add any further information as it becomes available. On Aug-03-20 at 11:04:17 PDT, seller added the following information:I have added more pictures per bidders request. It has come to my attention that the key to wind the clock is not the correct size. As a result, I am unable to wind the mechanism to test function. The clock is presumed to be functional but is untested. If anyone wishes to withdraw their bid, feel free to do so. Full disclosure is the only way I ebay. Thanks!