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.

COLLECTORS' ITEM - AUTHENTIC GRAND SEIKO 5645-7000 HI-BEAT 36600 bps GENTS WRISTWATCH

BRAND :GRAND SEIKO HI-BEAT GENTS WRISTWATCH
MODEL :5645-7000

MOVEMENT/ENJIN :SUPERB 5646A 25 JEWELS AUTOMATIC WINDING HI-BEAT 36600 MOVEMENT

ORIGIN/BUATAN : JAPAN
NO. SIRI/SERIAL NO. : 073501

CIRCA/TAHUN :1970

CASING/KEMASAN : SOLID STAINLESS STEEL

FUNCTION/FUNGSI : HOUR, MINUTES, SECOND, QUICK SET DATE AT 3:00 & HACKING SYSTEM
DIAL: SILVER TONE
BEZEL: STAINLESS STEEL

MARKINGS/TANDA JENAMA : DIAL,CASEBACK, MOVEMENT WITH GRAND SEIKO GOLD SHEILD
BAND/TALI : NON SEIKO NEW BLACK LEATHER STRAP FIT 8.5" WRIST
LUGS SIZE: 18mm
BAND WIDTH: 18mm

LENS/CERMIN : HARDLEX MINERAL CRYSTAL

MEASUREMENT/UKURAN : 37mm WITH CROWN X 39mm LUG TO LUG
WATER RESISTANT: YES BUT NOT TESTED

CONDITION/KONDISI : EXCELLENT WORKING CONDITION
RARE GRAND SEIKO WITH MINT GOLD SHEILD SOUGHT AFTER BY COLLECTOR
PRICE/HARGA: RM6,500(NEGOTIABLE/BOLEH DIRUNDING)
LISTING: RM6,500.00 SOLD:

BRIEF INFORMATION ON SEIKO WRISTWATCHES

The company started with the name Seiko in 1938. However, the original ancestor of the company was a business run by a local clockmaker in Tokyo by the name, Kintaro Hattori. The business was named K. Hattori and later it evolved into a company by the name Seiko corporation, Tokyo. The business originally started as a clock and jewellery shop and in 1892. It began production of clocks under the name Seikosha, which later evolved into Seiko.

Initially the company was named K. Hattori & Co in 1918 and was later named as Hattori Seiko & Co in 1983. Finally, in 1990 it became Seiko corporations. It established various companies under its name such as Seiko Watch Corporation, and became a holding corporation in 2001 and was finally named as Seiko Holdings Corporation in 2007. Although the company produces many different types of clocks and watches, it is particularly famous for its wristwatches.

In 1924, the first watch under the name Seiko was produced. Seiko also has the honour of producing the first quartz watch in the world under the name Astron. Thus by this fact only, one can get a basic idea of the rank of Seiko watches in the world of wristwatches. When this watch was first introduced, its cost was more than that of a medium sized car. However, this watch was a breakthrough in technology and set a new standard, which is being followed to this day.

In 1985 Seiko and orient watches set up a joint factory, which produces millions of watches each year. Seiko watches are known for their reliability and accuracy in time keeping, which is why their watches have been used for official time keeping in major sports events and the Olympic Games, which is also an honourable rank for the company.

The company produces different lines of watches of which, the most famous are Seiko 5, Grand Seiko, King Seiko and Credor. Collectors, due to their high esteem and unique features, treasure these watches as prized possessions. Seiko mechanical watches are especially considered as prized possession by collectors. When it comes to Seiko classic watches, the older a watch, the more precious it is.

Seiko wristwatches range from 50$ to 100,000$, which is certainly a price tag for luxury and high esteem. The Seiko kinetic watches being produced these days take the major portion of their sales in the modern era as they combine the self-energising feature of automatic watches with the high accuracy of quartz in time keeping.