Specifications
- Movement
- Seiko 4R36, automatic with hand winding
- Accuracy
- +45 to -35 sec/day
- Case diameter
- 36.4 mm
- Lug-to-lug
- 44.4 mm
- Thickness
- 12.5 mm
- Lug width
- 18 mm
- Case
- Stainless steel (hard coating)
- Crystal
- Hardlex
- Water resistance
- 100 m
- Magnetic resistance
- 4,800 A/m
- Weight
- 64 g
- Strap
- Nylon
- Band length (max)
- 225 mm
- Lume
- LumiBrite on hands and index(es)
- Dial
- Yellow
- Features
- LIMITED EDITION on the case back, See-through & Screw case back, Serial number engraved on the case back
- Released
- 2026-07
- Series
- Seiko 5 Sports, Field series
Same case, other dials
Identical case, movement and dimensions; only the dial, bezel or finish differs.
Other watches on the 4R36
Questions
Is there a Japanese version of the Seiko HDB010?
The Japanese Seiko site lists no model with the same calibre, case and dial, so the HDB010 has no Japanese domestic twin in the current lineup.
What movement is in the Seiko HDB010?
The HDB010 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 HDB010 have a sapphire crystal?
No. The HDB010 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 HDB010?
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 HDB010?
18 mm. Any 18 mm strap fits.