AUTHENTIC LUXURIOUS SEIKO SPRING DRIVE GMT POWER RESERVED GENTS WRISTWATCH

MOVEMENT	ORIGINAL SPRING DRIVE MOVEMENT Cal. 5R66A,
METAL	Solid Stainless Steel Case and Case back.
CASE 'n SIZE	ORIGINAL FACTORY CASE WITH ORIGINAL . .Width: 43mm excluding crown; length: 49mm from lug to lug. Thick: 13mm with bezel.
DIAL/MINUTE CHAPTER RING/HANDS	ORIGINAL SEIKO 5R66-0AJ0 DIAL AND HANDS
STEM/CROWN	ORIGINAL STEM ORIGINAL CROWN It Comes With Date Wheel.
CRYSTAL/Retainer RING	Original Seiko Sapphire Crystal
Rotating BEZEL 'n INSERT	None
BRACELET/STRAP	It comes with Original Seiko 34L5-B-C Stainless Steel Bracelet strap.FAT SPRING BARS are used in this watch as Seiko watches should come on fat spring bars. (Never been used, kept in the box)
SERIAL NUMBER	670048 which dates production back on July 2006 She is 6 years old but look like new
FUNCTIONS	72 hrs Power Reserved, GMT, Quickset Date, Water Resistant 10 BAR

PRICE: retail preowned RM19,000++ but this is my personal collection but willing to let go if the price offered is reasonable

Brief Information on Seiko Spring Drive Wristwatch 

The Spring Drive is a watch movement that was developed by Seiko Epson through collaboration with Seiko Instruments and Seiko Holding. Up-to-date, it is the only commercially available wristwatch embedded technology capable of truly creating a continuous movement of the second hand, instead of the traditional beats per time unit as seen in quartz or mechanical watches.

It uses a mainspring, barrel, automatic winder and stem winding like in a mechanical watch to store the watch energy. The conventional escapement is replaced with a device that Seiko calls a Tri-synchro Regulator to regulate the unwinding of the mainspring. The regulator controls the use of the three forms of energy used in the Spring Drive mechanism; the mechanical power of the mainspring, the electrical energy generated from this mechanical power, and the electronicmagnetic energy that governs the rotation of the glide wheel. The energy produced by the glide wheel is used to power a control circuit and quartz crystal oscilator, which in turn regulates the electro-mechanical braking of the glide wheel.

The glide wheel's speed is sampled 8 times per second (i.e. each time it makes a complete revolution around the regulator) and compared with the reference quartz signal by the circuit. A variable braking force is continuously applied to regulate the glide wheel's frequency. This is the only movement with a time-only feedback (or phase-locked) loop in existence today.

The Tri-synchro Regulator's innovations result in a watch where the hands glide instead of ticking as in a conventional mechanical or quartz watch. This is because the movement never stops as in a traditional escapement, it is slowed to the proper speed by the brake. The movement is specified to 1 second accuracy per day. However, 1-2s per week is commonly reported by owners.

The movement is used on the Spring Drive International collection and in some watches of Grand Seiko, Credor, Galante, Izul, Ananta and Prospex series. Complications include moon phase, power reserve, chronograph, sonnerie, GMT and calendar functions. These watches are fairly expensive, with the least complicated models costing several thousand dollars. The top of the line is the Credor Minute Repeater in rose gold priced at 33 million yen (over $400,000 USD) and can be considered a grand compilation.