Grand Seiko SBGX039 & SBGX045: Reinforced Magnetic Resistant Quartz (SMR40000) Models

In 2003, Seiko Watch Corporation released the Grand Seiko Reinforced Magnetic-Resistant Quartz Model SMR40000. With a suggested retail price of 330,000 yen (excluding tax), it was sold via Grand Seiko Master Shops in Japan. This watch has an incredible magnetic resistance up to 40,000 A / m (500 GAUSS).

SBGX039 is the first quartz Grand Seiko watch to reach a high magnetic resistance of this level. SMR40000 is the abbreviation for Super Magnetic Resistant 40,000A / m. To minimize the effects of magnetism, thick pure iron plates are provided above (underneath the dial) and below the quartz movement. Its stainless steel case measures 38.2mm diameter and 10.9mm thickness.

Grand Seiko SBGX039
Grand Seiko SBGX039

The dial of Grand Seiko SBGX039 has a diameter of 31.5 mm. The hour and minute hands and hour marks are gray-plated to maximize visibility. In addition, the silvered dial surface is given a checkered pattern by ultra-fine stamping and a composite finish of the GS logo and lion mark by laser processing, creating a deep and luxurious feeling even in a casual manner.

In 2005, Grand Seiko released SBGX045, a Reinforced Magnetic Resistant Quartz Model <SMR40000> in a bright titanium case measuring 38.2mm diameter and 10.9mm thickness. Launched with a retail price of 420,000 Yen (including taxes), this Master Shop Limited Edition watch features a black dial and a titanium bracelet.

Grand Seiko SBGX045

Thanks to the light-weightiness of titanium, SBGX045 weighs 95g only where as its predecessor in steel (SBGX039) has a weight of 145g.

Both timepieces are equipped with the Grand Seiko 9F61 quartz movement.

Technical details

Grand Seiko reinforced magnetic resistant quartz model SMR40000
Reference: SBGX039

Grand Seiko SBGX039

Case
Stainless steel
Glass: Sapphire glass (with anti-reflective coating)
Case outer diameter: 38.2 mm
Thickness: 10.9mm
Magnetic resistance: Magnetic resistance 40,000A / m (500 GAUSS)
Screw- lock crown
10 ATM water resistant
Screw back

Dial
Design: Check pattern
Diameter: 31.5 mm
Dauphine-shaped hour and minute hands
Luminescent coating: Nil

Movement
Quartz movement 9F61 caliber
Time accuracy: ± 10 seconds per year (when worn on the wrist at temperatures between 5 ° C and 35 ° C)

Display
Hour, minutes and centre seconds

Bracelet
Stainless steel bracelet

Model: Grand Seiko Reinforced Magnetic Resistant Quartz Model SMR40000 in Titanium
Reference: SBGX045

Grand Seiko SBGX045

Case
Bright titanium case
Glass: Sapphire glass (with anti-reflective coating)
Case outer diameter: 38.2 mm
Thickness: 10.9mm
Magnetic resistance: Magnetic resistance 40,000A / m (500 GAUSS)
Screw- lock crown
10 ATM water resistant
Screw back

Dial
Black dial
Diameter: 31.5 mm
Dauphine-shaped hour and minute hands
Hour and minute hands with Lumibright
Baton indexes
3, 6, 9 and 12 indices with Lumibright

Movement
Quartz movement 9F61 caliber
Time accuracy: ± 10 seconds per year (when worn on the wrist at temperatures between 5 ° C and 35 ° C)

Display
Hour, minutes and centre seconds

Bracelet
Titanium bracelet with one-push tri-fold clasp