After many hours of experimenting with various motor speeds, mounting arm attachments, and watch positioning in respect to rotation axis, we have found that the winder shown is the simplest solution at the lowest cost. The result is that a 30 minute or less run time can effectively charge a Seiko Kinetic Watch battery so that the watch will run for an average of 3-7 days without any additional motion. Longer rotation periods will provide additional days or weeks of battery charge.
Example of stand winding time vs battery charge : A 5-hour winding duration + 3 hours of wearing the watch (shown in the photo) has charged the watch's battery enough to run the watch for 34 days without being worn. 
List of components in assembly: Of course, watch is not included. :)
1. New, Heavy Duty, High Torque, Low Noise (42-45 db/2 feet) worm geared 12V DC reduction motor with 8mm shaft
2. 1-inch diameter aluminum motor adapter (with stainless steel M4 hex drive setscrew) 
3. Foam watch pad disc with center hole to mount on the shaft coupler - protects watch back from damage
3b. (Not shown) Elastomer adaptor ring (under item 3) for aluminum motor adapter to prevent slippage between the foam watch pad disc and the aluminum adapter
4. Illuminated button (green) on/off switch - maintains illumination while motor is powered on
5. 3 millimeter thick formed aluminum mounting stand with 2 mounting holes for permanent mounting (as alternative to using the included low profile desk clamp)
6. Low-profile, multi-purpose padded mount clamp or 2-inch hand clamp for quick desk/table attachment and removal 
7. 12V DC power supply (not shown) with quick disconnect couplers and 45 inch long cable. (Extension cable use may be required) Power supply can be plugged into wall outlet with body facing up or down. 
Dimensions of assembly: 10 inches tall x 2 inches wide x 2.25 inches deep

Please note: The included foam disc to which the watch is mounted is designed for kinetic watches with either canvas bands with buckle straps or metal band watches. Women's metal band watches may require the foam watch pad disc to be trimmed. Men with extra large writs can request a larger foam and sleeve kit. Please inquire.

Fully assembled winder - Simply plug in the power supply to a 110-120V AC outlet receptacle, connect in the end of the power supply cable plug to the switch wires' female plug, wrap the watch tightly around the foam tubular piece, and push this assembly onto the shaft coupler. Adjust the watch orientation as shown in the included quick startup procedure. Press the start switch and let the winding process continue for minutes or hours. The longer it winds, the more fully charged the watch battery will be.

 Low-Profile screw clamp with rubber contact areas      Self-Standing design with solid stainless steel base