Grand Seiko SBGR301 Black Dial

Grand Seiko SBGR301

The Grand Seiko SBGR 301 is a stainless steel men’s timepiece from the Grand Seiko Heritage series. It uses an automatic (self-winding) movement, but also offers a manual winding option.

The Grand Seiko SBGR301 At A Glance

• Movement: Automatic
• Caliber: 9s61
• Diameter: 47.9 mm
• Number of jewels: 33
• Glass: Sapphire glass with anti-reflection coating
• Case Material: Stainless steel
• Case shape: Round
• Case thickness: 13.1 mm
• Water-resistance level: 10 atm
• Bodyweight: 174g
• Drive time: 72-hour power reserve
• Static accuracy: Average day difference + 5 seconds to -3 seconds
• Typical day accuracy: Average day difference of +10 seconds to -1 seconds
• Released: May 3, 2017

Browsing Through Its Features

The Grand Seiko SBGR301 has a stainless steel, water-resistant case. The diameter of this watch is 47.9 mm, with a casing thickness of 13.1 mm. It features a water resistance level of 10 atm for everyday use. It also has a stainless steel plain bezel, similar to the casing. Weighing in at 174g, the SBGR301 is a slightly heavy watch that sits boldly on the wrist.

The SBGR301 features a round black analog dial with no dial numerals. It is a traditional stick dial that displays the familiar company logo and the word “automatic” to indicate the movement of the timepiece.

The watch glass is made from transparent sapphire crystal and has an anti-reflection coating.

The bracelet is made from the same stainless steel material as the casing and features a push-button deployment clasp with the company logo branded on the surface. The design is a familiar oyster strap rendered in stainless steel.

The back of the watch reveals a see-through case back, which allows a view of some of the inner mechanisms on the clock. A stainless steel plate covers most of the dials with the company name and logo engraved in gold leaf.

The SBGR301 displays a stainless steel screw-down crown at the 3 ‘o'clock position. The crown has an antimagnetic feature which allows the watch to work with minimal deviations in a magnetic field.

Looking Closely at the Design

This brand is known for respectful attention to detail, which is apparent in the design of the Grand Seiko SBGR301. The stainless steel case features a gentle curve that molds comfortably into the wrist.

The tonneau-shaped watch face and the subtle angles of the stainless steel casing offer a fresh twist to a classic design.

The stainless steel crown blends beautifully into the watch and is neither obtrusive nor garish. The round face steel bezel features no designs, offering understated efficiency. The lugs blend seamlessly into the bezel and strap.

The back of the watch displays the see-through case, which shows parts of the inner movement and rotors of the timepiece. The rest is covered by a stainless steel plate that features the company logo and name embossed in gold.

This watch features a stainless steel oyster strap. The bracelet was designed to withstand many years and features a sturdy push-button clasp engraved with the company logo.

Studying the movement

The Grand Seiko SBGR301 was designed with a 9s61 caliber. With a static accuracy of +5 to -3 seconds a day and a standard usage accuracy of +10 to -1 seconds a day, this timepiece was designed with accuracy and precision as a standard.

It possesses an automatic 3-day power reserve and oscillates at 28,800 vibrations per hour (8 beats per second).

Seiko utilizes Micro Electro Mechanical Systems (MEMS) technology to manufacture its parts, giving it precision within one-thousandth of a millimeter.

The balance wheel is calibrated within one ten-thousandths of a gram, ensuring optimal stability and accuracy.

The hairsprings are beautifully coiled and precision-crafted to within one-hundredth of a millimeter.

Multiple mechanisms have been put in place to control the effect of temperature fluctuations on the accuracy and precision of its components.

The mechanism uses a reversal gear train system, which increases the durability and life span of the timepiece.

This watch typically costs around $4,300 USD.

Watch Features

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