Seiko 4R36 4R36A Automatic Watch Movement Day/Date - CT532
Seiko 4R36 4R36A Automatic Watch Movement Day/Date - CT532 - Image 2

Seiko 4R36 4R36A Automatic Watch Movement Day/Date – CT532

Price range: $138.00 through $172.00

The Seiko 4R36 is a reliable and durable watch movement. It’s a common choice in Seiko’s 5 Sports line, King Turtle, and other models. The 4R36 is an upgrade from the 7S26 movement, adding features like hacking seconds and manual winding. It’s also considered a Seiko-branded version of the NH36 movement, a popular choice for modders and watch enthusiasts. 

Key features and specifications:
  • Type: Automatic movement.
  • Accuracy: +45 to -35 seconds per day.
  • Jewels: 24.
  • Beats per hour: 21,600 (6 times per second).
  • Power reserve: Approximately 40 hours.
  • Functionality: Hacking seconds (stops the seconds hand for precise time setting), manual winding, and date and day-of-the-week display.
  • Diashock anti-shock system: Provides protection against shocks and vibrations.
  • Magnetic Resistance: The 4R36 movement is also equipped with resistance to magnetic fields.
Upgrade from 7S26: 
  • The 4R36 offers improvements over the 7S26, such as hacking seconds and manual winding. 
  • It uses different stem and crown than the 7S26. 
Comparison to NH36:
  • The 4R36 is the Seiko-branded version of the NH36.
  • The 4R36 uses higher-quality parts than the NH36.
Maintenance and Service:
  • Like other watch movements, the 4R36 requires periodic servicing to maintain its accuracy and reliability.
  • Servicing can involve cleaning, lubricating, and potentially replacing worn components.
  • Seiko offers service options for their movements, including potentially swapping in a new movement instead of full service. 
Manufacturer Seiko
Caliber Number 4R36, 4R36A
In-House?
 Yes
Movement Type Automatic, self-winding mechanical
Diameter
 27.4mm
Casing Diameter
 27mm
Thickness
 5.32mm
Jewels 24
Beat Rate / Frequency
 21,600 bph / 3 Hz
Lift Angle
 53 degrees
Power Reserve
 ~41 hours
Hand Windable? Yes
Hand-Winding Direction
 Clockwise
Rotor Winding Direction
 Bi-Directional (Magic Lever)
Anti-Shock System
 Seiko Diashock
Regulator System
 ETACHRON
Functions Central hours; central minutes; central sweeping seconds; day/date calendar at 3:00
Hacking Seconds? Yes
Country of Manufacture Made in Japan
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SKU: CT532 Categories: , Tag: Brand: