Seiko 5 Sports SRE021
Blue dial, 32.0 mm, 2R06 automatic.
- Japan: SRRA009
- 2R06
- 32.0 × 38.7 mm
- 100 m
- Hardlex
- $385
Specifications
- Movement
- Seiko 2R06, automatic with hand winding
- Accuracy
- +45 to -35 sec/day
- Case diameter
- 32.0 mm
- Lug-to-lug
- 38.7 mm
- Thickness
- 11.4 mm
- Lug width
- 15 mm
- Case
- Stainless steel
- Crystal
- Hardlex
- Water resistance
- 100 m
- Magnetic resistance
- 4,800 A/m
- Weight
- 90 g
- Band length (max)
- 185 mm
- Clasp
- Three-fold clasp with push button release
- Lume
- LumiBrite on hands and index(es)
- Dial
- Blue
- Features
- Screw case back
- Released
- 2025-10
- Series
- Seiko 5 Sports, SNXS series
Same case, other dials
Identical case, movement and dimensions; only the dial, bezel or finish differs.
Other watches on the 2R06
Questions
What is the Japanese version of the Seiko SRE021?
In Japan the SRE021 is sold as the SRRA009: the same 2R06 calibre, the same 32.0 mm case and 100 m water resistance. Only the reference differs by market.
What movement is in the Seiko SRE021?
The SRE021 runs on the Seiko 2R06, an automatic movement that can also be wound by hand. See the 2R06 page for its specs and every watch built on it.
Does the Seiko SRE021 have a sapphire crystal?
No. The SRE021 has a Hardlex crystal. Hardlex is Seiko's hardened mineral glass: tougher than plain mineral glass, softer than sapphire.
How water resistant is the Seiko SRE021?
100 m (10 bar). That covers swimming and snorkelling; it is not a certified diver's watch unless Seiko says so.
What is the lug width of the Seiko SRE021?
15 mm. Any 15 mm strap fits.