Specifications
- Movement
- Seiko 4R36, automatic with hand winding
- Accuracy
- +45 to -35 sec/day
- Case diameter
- 42.5 mm
- Lug-to-lug
- 46.0 mm
- Thickness
- 13.4 mm
- Case
- Stainless steel, see-through case back
- Crystal
- Hardlex
- Water resistance
- 100 m
- Magnetic resistance
- Magnetic resistant
- Weight
- 146 g
- Clasp
- One-push three-fold clasp
- Lume
- LumiBrite on hands, index(es) and bezel
- Features
- Double-lock clasp, SPECIAL EDITION on the case back, See-through & Screw case back, Unidirectional rotating bezel
- Series
- Seiko 5 Sports, SKX series
- Style
- SKX Sports Style (2019 lineup)
Same case, other dials
Identical case, movement and dimensions; only the dial, bezel or finish differs.
- HDB011 Black · 42.5 mm · 4R36 $460
- HDB012 Orange · 42.5 mm · 4R36 $500
- SBSA281 Blue · 42.5 mm · 4R36 $430
- SBSA315 Turquoise · 42.5 mm · 4R36 $460
- SRPD51 JP SBSA001 Blue · 42.5 mm · 4R36 $350
- SRPD53 JP SBSA003 Blue · 42.5 mm · 4R36 $350
- SRPD55 JP SBSA005 Black · 42.5 mm · 4R36 $350
- SRPD59 JP SBSA009 Orange · 42.5 mm · 4R36 $350
- SRPD63 JP SBSA013 Green · 42.5 mm · 4R36 $350
- SRPD65 JP SBSA023 Black · 42.5 mm · 4R36 $395
- SRPD79 JP SBSA025 Black · 42.5 mm · 4R36 $375
- SRPD91 Black · 42.5 mm · 4R36 $375
Other watches on the 4R36
Questions
What movement is in the Seiko SBSA221?
The SBSA221 runs on the Seiko 4R36, an automatic movement that can also be wound by hand. See the 4R36 page for its specs and every watch built on it.
Does the Seiko SBSA221 have a sapphire crystal?
No. The SBSA221 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 SBSA221?
100 m (10 bar). That covers swimming and snorkelling; it is not a certified diver's watch unless Seiko says so.