Seiko SBTR021 Quartz Chronograph Black Dial Leather Strap Watch 8T63 10 Bar

■ Product Overview

The SEIKO Selection SPIRIT SBTR021 is a battery-powered quartz chronograph watch featuring a black dial, stainless steel case and black calf leather strap.

It is powered by the SEIKO Caliber 8T63 and includes a 1/5-second chronograph, 24-hour indicator, small seconds display, date window and tachymeter scale.

■ Key Features

• SEIKO Caliber 8T63 quartz movement

• Black dial with three chronograph subdials

• Stopwatch measurement in 1/5-second increments for up to 60 minutes

• 24-hour indicator

• Small seconds display

• Date calendar

• Tachymeter scale

• LumiBrite on the hands and indexes

• Hardlex crystal

• Black calf leather strap

• Push-button three-fold clasp

• Screw case back

• 10 bar water resistance

■ Specifications

Brand: SEIKO

Series: SEIKO Selection SPIRIT

Model Number: SBTR021

Display: Analog

Movement Type: Battery-powered quartz

Caliber: 8T63

Dial Color: Black

Case Material: Stainless steel, partially hard-coated

Case Color: Silver and black

Case Size: Approx. 47.0 × 39.8 × 11.7 mm

Crystal: Hardlex

Strap Material: Calf leather

Strap Color: Black

Strap Width: 20 mm

Maximum Wrist Circumference: Approx. 195 mm

Clasp: Push-button three-fold clasp

Weight: Approx. 81 g

Water Resistance: 10 bar

Case Back: Screw case back

■ Movement and Functions

Movement: SEIKO Caliber 8T63

Accuracy: Average monthly rate of ±15 seconds under normal operating conditions

Chronograph: 1/5-second measurement for up to 60 minutes

Time Display: Hour, minute, small seconds and 24-hour indicator

Calendar: Date display

Tachymeter: Yes

Estimated Battery Life: Approx. 3 years

■ Battery Information

Battery Type: SEIKO SR936SW silver-oxide button cell × 1

The battery is installed in the watch.

The battery installed at the factory is used to test the watch’s functions and performance. Its remaining life after purchase may be shorter than the stated approximately three-year battery life.

The battery is not rechargeable. Battery replacement should be performed by a qualified watch technician or an authorized SEIKO service provider.

■ Package Contents

• SEIKO SBTR021 watch × 1

• SEIKO presentation box

• Japanese warranty documentation

The instruction manual may be provided digitally through the manufacturer’s website rather than as a printed booklet.

The design and specifications of the packaging, warranty documentation and included printed materials may vary depending on the production period.

■ Important Notes

• The 24-hour indicator shows the current time in a 24-hour format. It is not an independently adjustable GMT or second-time-zone hand.

• The small seconds subdial displays the watch’s continuously running seconds. The central chronograph hand is used for stopwatch measurement.

• Due to the construction of the screw case back, the orientation of the markings on the case back may vary and may not appear perfectly upright.

• Water resistance is rated at 10 bar. Follow the manufacturer’s instructions regarding permitted use. Avoid diving, hot water, saunas and high-pressure water.

• Water resistance may decrease over time due to deterioration of gaskets or impact. Periodic inspection is recommended.

• Keep the calf leather strap away from water, excessive perspiration, chemicals, solvents and direct heat.

• Do not attempt to recharge, disassemble, heat or short-circuit the button-cell battery.

• If the battery is removed, keep it away from children. Seek immediate medical attention if it is swallowed.

• This product is intended for the Japanese market. The packaging and warranty documentation may contain Japanese text.

• Display accessories and photography props are not included.

• Manufacturer warranty availability and validity outside Japan are not guaranteed.