Fully Restored! Birthday Watch May 1985! Seiko 5 6309-8840 SUWA 17J Automatic Watch (OH)

A BIRTHDAY WATCH IS A WATCH THAT WAS PRODUCED THE SAME MONTH AND YEAR AS YOUR BIRTHDAY.

Type: Automatic
Model: Seiko 5 SUWA
Year of Production: May 1985
Movement: 6309A
BPH: 21,600
Number of Jewels: 17
Hand and Dial: 3D Baton Indices with Lumen Baton Hands
Width: 36mm
Height (Lug to Lug): 41mm
Thickness: 11mm
Lug Width: 19mm
Strap: Original Seiko Signed Jubilee/Super Engineer SS Bracelet
Pouch / Box: Brand-New EVA Type Zipper Pouch

According to most legitimate online information available, the Seiko 6309 movement made its debut in 1976 and lasted until 1988.

This movement was extremely successful and was used in numerous vintage models including this famous 6309 Turtle Diver Range.

For Seiko Collectors and Vintage fans, this is a Fully Restored Seiko 5 6309-8840 SUWA in mint condition.

This classic 6309-8840 Automatic has a well preserved snow-white dial, 3D baton indices and baton lumen hands (that are operable), and date/day window that underwent a good clean-up thus revealing zero signs of aging.

The classic cylindrical shaped silver case and original Seiko Signed SS bracelet were given a full polish and are now in mint condition. The crystal is an original and is also in mint condition. 

The crown is located at its traditional 4H position and tucked away nicely to prevent damage or snags, yet easily accessible.

The Hands and Day/Date adjustments are via the traditional method of pulling out the crown to the first and second level for date and time adjustment respectively.

The Day is in English and Roman Numerals, cool!

The movement was carefully stripped and meticulously cleaned via ultrasonic immersion, oiled, re-assembled and calibrated on 8 May 2024; hence it underwent a full overhaul and should be able to operate unhindered until the next servicing thereby providing the owner a peace of mind.

Equipped with the famous 6309 workhorse movement, it has 17 jewels and operate at 21,600 BHP. The time-grapher, after hours of calibration, shows excellent readings of -64 seconds on average with an amplitude of 145 with a relatively straight line! Such readings are exceptional even by brand new modern automatic watch standards! This is a testament to the quality, the meticulous care provided over the years, and the painstaking expert calibration conducted. 

The case width and height are approx. 36mm and 41mm respectively. The lug width is 19mm and the bracelet can accommodate wrists up to 20cm; hence, suitable for men and the modern women.

All seals and gaskets have been serviced/replaced. However, due to its age, this timepiece has not been water-resistant tested.

To the best of our knowledge while overhauling this timepiece, the watch is 100% original Seiko components from this particular watch. No parts were replaced with aftermarket or modified parts. 

The pictures provided shows the watch in mint condition, and the movement within squeaky clean and well maintained. It has also been demagnetised to improve parts reliability, minimise wear + tear, and improve accuracy. The only drawback is the lack of documentation and original box. A brand-new EVA Pouch is provided.

This super rare watch will make a beautiful birthday present for that special someone born in May 1985, and its value will appreciate over time.

Bear in mind that this watch has seen many of the previous owners’ ups and downs in life, and should be cared and cherished for the next generation to savour such engineering beauty.

Do also bear in mind that it will cost between S$ 180.00 to S$ 200.00 for a proper overhaul, an estimated S$ 80.00 to calibrate, and S$ 80.00 to clean and polish the entire watch including bracelet link tightening - these costs do not apply when purchasing this timepiece. So, if anyone was to sell such a timepiece at a low price yet claim that it has been serviced, one has to ask what kind of servicing was conducted, if any.

This is a highly sort-after Seiko 5 6309-8840; so, be unique and own a watch that is almost impossible to source in mint condition.