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 (hard coating)
- Crystal
- Hardlex
- Water resistance
- 100 m
- Strap
- Nylon
- Lume
- Lumibrite on hands and indexs
- Features
- Screw case back, See-through case back, Unidirectional rotating bezel
- Series
- Seiko 5 Sports, SKX series
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 SRPD77?
The SRPD77 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 SRPD77 have a sapphire crystal?
No. The SRPD77 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 SRPD77?
100 m (10 bar). That covers swimming and snorkelling; it is not a certified diver's watch unless Seiko says so.