The Seiko Spirit SBTR021 is a black-dial quartz chronograph on a black leather strap. Silver-tone hands and bar indexes sit on a black dial, and the tachymeter scale is printed on a black insert rather than on a bare steel bezel. It uses calibre 8T63, the same quartz chronograph as the green SBTR017. It is not an automatic watch.
The layout matches the green sibling. The 60-minute chronograph counter is at 9. The 24-hour hand is at 3 and tracks the time of day, not a second time zone. Small seconds are at 6. The date window sits near 4:30, between 4 and 5. The dial reads SEIKO and CHRONOGRAPH. Two pushers flank the crown. The strap is black crocodile-pattern leather with a light lining. The gallery for this listing is two dial views, so the clasp and case back are not pictured here.
Who it suits
This is the quieter colour of the small Spirit chronograph: black dial, black insert, black strap, steel case. It is easier to wear with a jacket than a large diver chronograph, and the stopwatch is there when you need it. Water resistance is 100 metres (10 bar). That is daily-wear resistance, not a dive rating. The bezel does not rotate as a dive timer.
The black-dial SBTR013 is a different case, about 42.2 mm, in the same calibre family. Do not order this reference if you were measuring that wider watch.
Specifications
- Reference: SBTR021, Seiko Spirit (some shops file it under Seiko Selection)
- Movement: quartz calibre 8T63, not automatic
- Accuracy: within 15 seconds a month at normal temperature, from the 8T63 instruction
- Battery: SR936SW, about three years when the chronograph runs for less than an hour a day
- Chronograph: 1/5-second timing up to 60 minutes
- Other hands: 24-hour hand, small seconds, date near 4:30
- Case: stainless steel. Published sheets for this reference list 39.8 mm width
- Thickness: 11.7 mm on one sheet for this case, 11.6 mm on another. Not collapsed to one figure
- Lug-to-lug: 47 mm on the 47.0 by 39.8 by 11.7 mm sheet; one shop sheet says 46 mm
- Strap: black leather, 20 mm on retailer sheets for this reference
- Crystal: Hardlex, not sapphire
- Bezel: black insert with a tachymeter scale
- Water resistance: 100 metres / 10 bar
- Case back: not shown in this gallery
- Lume: LumiBrite on the hands and indexes
- Not a numbered limited edition
A 42.2 mm figure belongs to the SBTR013, not to the photos of this watch. The case back is not in this gallery. The case back of the unit supplied shows where it was made.
Questions buyers ask
What movement does the Seiko SBTR021 use?
Quartz calibre 8T63. It times to one-fifth of a second for 60 minutes, with a running small seconds hand and a 24-hour hand. Accuracy in the calibre instruction is within 15 seconds a month. The battery is an SR936SW, rated at about three years if the stopwatch is used for less than an hour a day. A small seconds hand that jumps every two seconds is the low-battery signal. There is no mainspring and no power-reserve display.
Is the SBTR021 an automatic watch?
No. It is a quartz chronograph, calibre 8T63. There is no rotor and no mainspring.
What is the water resistance of the SBTR021?
100 metres, or 10 bar, the same rating as the SBTR017. It is suitable for daily wear and rain. It is not a dive watch, and the black insert is a tachymeter, not a countdown bezel.
What size is the Seiko Spirit SBTR021?
Retailer sheets for this reference list a 39.8 mm case width, matching the green SBTR017 rather than the 42.2 mm SBTR013. Thickness is 11.6 mm on one sheet and 11.7 mm on another. Lug-to-lug is 46 mm on one sheet and 47 mm on the 47.0 by 39.8 by 11.7 mm line. Strap width on those sheets is 20 mm. No weight is published here, because the shop figures do not agree tightly enough to pick one.
How is the SBTR021 different from the SBTR017?
The SBTR017 has a green dial, gold-tone hands, a steel tachymeter bezel, and a brown leather strap. The SBTR021 has a black dial, silver-tone hands, a black tachymeter insert, and a black leather strap. The calibre, the subdial layout, and the 100 metre rating are the same. This gallery does not include a clasp or case-back frame.
Where can I buy the Seiko SBTR021 in Australia?
Chronospride has the SBTR021 in stock for Australian delivery. The Seiko range also includes the green SBTR017 if that dial is the one you measured.
Authentic stock, inspected before dispatch. Free shipping Australia-wide on eligible orders. Covered by Chronospride’s 12 months warranty, handled by our team. See our authenticity and warranty page.