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WW II U.S. Navy MK I Boat Clock Seth Thomas Chelsea

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This WW II Deck Clock Has Been Sold. Thank you!
 
WW II SETH THOMAS
MARK I BOAT CLOCK
U.S. NAVY + Naval Observatory Cartouche 


Seth Thomas, America's oldest clock maker started operations in 1813. Their Nautical clocks first appeared in the 1860's and were the official US Navy Ships' clock for almost 100 years

DIMENSIONS:

3 1/2"
  Diameter of face                    3 1/4" Deep
5 7/8"  Full Diameter                         Weight 4 lbs 14 oz

Presented is a very small, hinged bezel, Navy boat clock which is a miniature design of the huge Navy MK I DECK clock of WW II which was manufactured in accordance with military specifications 18C-11 and 18C -13. It is housed in a nickel plated bronze case weighing 4 pound 14 ounces quite a lot for this small a clock. The front section is hinged with all the controls on the back and mounts on a replacement aluminum backing plate. Compared to a quartz time piece the clock is keeping exceptionally good time as long as it is wound every four days.

This rare boat clock was  made for the U.S. Navy by Seth Thomas and dates to Ca 1940-41. It has a very small 3 1/2 inch, midnight black dial with white acid etched Arabic numerals and Arial font letters. The spade hands are painted white with the points at one time radium coated. The tan dots below the numbers held radium for night use, but that has since been removed. Radium is radioactive and its use has been suspended. The face and concave plastic dial are in near perfect condition and the nickel plating is free of pits and only has a few worn areas which are hardly noticeable.

                 Controls on back panel        
         Back of mounting plate with 3 holes
It is a rarity for a clock of this age and service at sea to be in this fine condition. It will make a perfect gift or for a collector of military timepieces.

                         Clear plastic lens and like new face

The seconds hand is located at the 12 O'clock position and is the only Navy clock with this unusual placement. Beneath the hand arbor is etched:

MARK I BOAT CLOCK
U.S. NAVY
(NO) LOCAL SERIAL NO 1370

(NO) represents the Naval Observatory cartouche which means the clock not only met the military specifications, but also met the stringent standards of this institution which maintains the Nation's Time Standard. At the bottom of the dial it is marked, MADE BY SETH THOMAS IN U.S.A.

The following controls are accessed on the back:

  • Fast - Slow adjustment. To regulate turn towards S to Slow and vice versa 
  • Stop - allows to precision setting with master clock
  • Set - moves hands
  • Wind - a key is included

It has an 11-jewel 8 day  movement that is wound, set and adjusted through a slotted cover at its rear whose knob is missing. A separate start/stop mechanism allows it to be synchronized with a master time piece. The movement is the same as would be found in a Chelsea clock made to the same specifications.

As originally fitted, there was a removable vibration dampener that is spring loaded and attaches to the bulkhead when the front of the case is removed by pulling its hinge pin. The bezel is dogged by turning a chrome wing nut and all is secure. The shock damping of the original design is not part of the replacement backing plate, but this does not affect its utility.

                Shown alongside its big brother the MK I Deck Clock        
                          Movement is on left. Mounting plate on right

CONDITION: This example has seen about 70 years of service, much of it at sea, and gives the appearance of ruggedness. The face is in excellent condition and shows little evidence of aging. The lens under most light conditions shows clear, but there are some light zig-zag scratches at the 1 - 2  O'clock position. The movement is keeping excellent time, but as the spring winds down the daily rate will change. It is best to wind it every four days. A key is included.

WARRANTY: We guarantee that this clock will be working on arrival and that our description is entirely accurate or your money back. The only conditions are that an email authorization be obtained within three days, and that the instrument is returned in its original condition and packaging, and insured for its full value. Unfortunately, shipping charges are not included in this offer and are non-refundable. This does not affect our policy on shipping damage which is discussed below.

PACKAGING: We take great care in packaging our clocks for shipment which includes bubble wrap, placing in a box, and then placing in a larger box surrounded by impact absorbent material. However, we are not responsible, once it is turned over to the carrier. Full Value insurance is required. In the event of damage due to shipping we will assist you in all respects even to filing a claim in your behalf.

This ship's U.S. Navy clock has a dramatic appearance and its black face makes it a perfect addition for your den wall or in a collection. 

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