The SEMPRE watchwinder is the first and only watch winding device that will keep virtually any hand-wound mechanical watch with an accessible crown fully wound when unworn. This patented design is truly unique in that it replicates the human action of finger winding a watch by rotating the winding crown similarly in a clockwise direction. The SEMPRE design substitutes a mechanical finger arrangement, called a "collet", which grasps the watch’s crown securely and rotates it. Several different size collets are provided to fit any watch crown diameter from 3 to 9 millimeters. These collets are custom made of acetal plastic to prevent scratching or marring of polished watchcase surfaces. The collet is mounted in a rotating tubular drive shaft, supported by low-torque precision ball bearings. It is powered by a miniature servomotor coupled to techno-polymer drive gear system fitted with a safety slip clutch. The collet is opened by pushing a spring-loaded plunger at the opposite end of the drive shaft. Releasing the plunger closes the collet, clamping it on the watch crown. Just as an individual winding his or her watch senses the increasing turning resistance of the crown as the watch is being wound, the microprocessor "brain" of the SEMPRE winder monitors the electrical current drawn by the gear motor as it rotates. The amount of force required to wind the mainspring of a mechanical watch, known as the winding torque, increases as the watch is being wound. As the torque increases, the drive motor draws more current. The control circuit is user-adjustable to shutdown the system when it senses that the current has reached a pre-set limit, one which is well below the maximum torque that the watch mainspring can handle. To prevent "overbanking" the drive reverses the crown momentarily after shutdown. For safety purposes, the drive system is fitted with a mechanical slip-clutch which has been factory set to slip at a safe torque in the event of a microprocessor failure. This redundancy eliminates any possibility of stressing or breaking the mainspring of an expensive and, perhaps delicate, mechanical watch. In operation, the winder automatically turns on every twenty-four hours. Upon actuation, the drive motor begins rotating the collet for 8 minutes. With the collet rotating at approximately 6 rpm, this provides a maximum of 48 crown rotations per day. However in practice, the actual number of rotations is controlled by the current feedback circuit whose priority is to shut down the motor based on torque, rather than by time. Size = 5.1"H x 9.7"W x 7.8"D

Retail Price $2,295.00

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This single Watch Winder is encased in a beautiful High Gloss Laquered Mahoganny finished wood case and is fully lined with luxurious black suede (also available in a high gloss piano black lacquered finish, ref. model #w06001). Unlike other watchwinders which rotate a watch in order to wind it, the unique SPARTA 1 watchwinder gently swings the watch instead. Every 10 minutes (standard program) or every 15 minutes (extended program), the internal control micro-processor signals the drive motor to make a single turn, causing the watch to swing back and forth for several oscillations just as it would if it were being worn on the wrist. The 15 minute program allows many watches that wind in both directions to remain fully wound while on the winder and at the same time provides increased battery life by as much as 35%. The watch to be wound is easily mounted over a resilient foam cushion, which accommodates virtually any size watch with either leather strap or metal bracelet. The cushion fits snugly into the drive cup, making it impossible for the watch to fall as the cup swings back and forth during the winding cycle. The cup is easily removed to facilitate watch mounting. The SPARTA 1 watchwinder is powered by two (2) 1.5 volt, "D" cell alkaline batteries (click here for enlarged view). As the drive motor only powers the first oscillation of each winding cycle, with all succeeding oscillations totally powered by gravity, battery drain on the motor is minimal. Hence, the SPARTA 1 watchwinder is guaranteed to operate for a MINIMUM OF TWO YEARS without any need for a battery change.

Retail Price $395.00

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Double Watch Winder, Encased in a beautiful High Gloss Mahogany Lacquer finished case. Also available in a high gloss piano black lacquer finished wood case (ref. model #w07010). Case is fully lined with luxurious black suede. This winder is powered by two sets of (2) 1.5 volt, "D" cell alkaline batteries, one for each head. Size = 6.0"H x 10.25"W x 8.0"D

Retail Price $695.00

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Double Watch Winder, This budget-priced free-standing open model is covered in a stylish textured Black leather-like material. Rubber feet prevent slipping and protect delicate surfaces from scratching. Size = 4.2"H x 9.5"W x 5.9"D

Retail Price $495.00

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Finished in a durable Madrona Burl vaneer and also available in Mahogany Parquet or Brazilian Rosewood. Designed to independently wind up to nine automatic watches. May be operated on batteries or with supplied AC/DC adapter.

Retail Price $6,995.00

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This case is covered with hand stitched Italian black leather. The snap in magnifying lens serves as a protective cover and a viewing aid. The winder can be programmed easily using the 4 position DIP switch. This allows you to control the watch turns per day and winding direction and automatic reversing. The winder operates with 4 "C" batteries or the supplied AC adapter. End of battery life indicator. Size = 5.6"H x 4.8"W x 4.2"D. We are an authorized Orbita dealer so your watch winder comes with a Orbita factory warranty.

Retail Price $395.00

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All current model watches of this brand are available. If you do not see the current model timepiece that you are looking for on this page, please contact us with the make and model number as it is most likely available at a great price.

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About Time not only offers exceptional quality watches but we also offer many fine Jewelry products as well.

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About Time offers free gift wrapping with your order. Simply ask when placing your order and we will gift wrap your fine timepiece free of charge.

Retail Price

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CLICK HERE TO E-MAIL: watches@abouttime.com for
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