SEIKO 5 Sports Auto

Items Description

The SEIKO 5 Sports Auto SRPD63K1 is a men's automatic dive watch designed for everyday wearers who value mechanical reliability, legible dive-watch styling, and a versatile stainless steel build. Part of the 5 Sports SKX series, it carries forward the recognizable case architecture and unidirectional bezel layout that have made this line a long-running reference point for affordable automatic sports watches.

 

At its centre is the Seiko Caliber 4R36, an automatic movement with manual winding capability and a power reserve of approximately 41 hours. The 42.5mm stainless steel case houses a green dial with Lumibrite on the hands and markers, a Hardlex crystal, and a 22mm lug width that opens the door to straightforward strap changes. With 10 bar water resistance and a weight of roughly 170g on the bracelet, it is positioned as a daily-wear piece rather than a purpose-built dive instrument.

 

Key Advantages of the SEIKO 5 Sports Auto SRPD63K1: 4R36 Automatic Dive Watch with Green Dial and Stainless Steel Bracelet

 

1. Caliber 4R36 Automatic Movement

The 4R36 is the mechanical foundation of the SRPD63K1. It is an automatic caliber with manual winding capability, which means the watch can be hand-wound from a stopped position and then kept running by the motion of the wrist. For wearers who rotate between several watches, that combination removes the need to shake the watch into life after a period in storage.

 

• Movement Type: Automatic with manual winding
• Caliber Number: 4R36
• Power Reserve: Approximately 41 hours when fully wound
• Jewels: 24 jewels supporting the gear train and reducing friction at key pivot points
• Hacking Seconds: The seconds hand stops when the crown is pulled out, allowing precise time setting

 

2. 42.5mm Stainless Steel Case and SKX-Derived Geometry

The case measures 42.5mm in diameter, 13.4mm in thickness, and 46.0mm lug-to-lug. Those dimensions place it in a mid-to-large range that reads substantial on the wrist without extending past narrower wrists. The lug-to-lug figure matters more than diameter for fit, and at 46.0mm the watch sits within the range that suits most adult wrists. The stainless steel case is paired with a unidirectional rotating bezel, the standard configuration for elapsed-time tracking on a dive-style watch.

 

• Case Material: Stainless steel
• Case Size: 42.5mm diameter, 13.4mm thickness, 46.0mm lug-to-lug
• Lug Width: 22mm, a common size for aftermarket straps
• Bezel: Unidirectional rotating bezel for elapsed-time measurement
• Weight: Approximately 170.0g on the stainless steel bracelet

 

3. Green Dial with Lumibrite and Hardlex Crystal

The green dial gives the SRPD63K1 a distinct identity within the 5 Sports range, where black, blue, and silver variations are common. Applied markers and hands carry Lumibrite, Seiko's luminous coating, which charges from ambient light and remains visible in low-light conditions. The dial is protected by a Hardlex crystal, a hardened mineral glass that resists the scratches and knocks a daily-worn sports watch tends to collect.

 

• Crystal: Hardlex, a hardened mineral glass
• Lume: Lumibrite applied to hands and hour markers
• Dial: Green finish with contrasting markers for legibility
• Day-Date: A day and date window at 3 o'clock for calendar reference

 

4. 10 Bar Water Resistance and 4,800 A/m Magnetic Resistance

The watch is rated to 10 bar, equivalent to 100 metres. That rating covers swimming, showering, and surface water sports, though it does not extend to saturation diving. Seiko also specifies magnetic resistance of 4,800 A/m, a relevant figure for wearers who spend time near laptops, tablets, and other sources of everyday magnetism that can affect mechanical timekeeping.

 

• Water Resistance: 10 bar / 100 metres
• Magnetic Resistance: 4,800 A/m
• Suitable For: Swimming, showering, and general water exposure
• Not Suitable For: Saturation diving or high-pressure professional diving

 

5. 22mm Bracelet and Strap Versatility

The SRPD63K1 ships on a stainless steel bracelet sized to a 22mm lug width. Because 22mm is one of the most widely supported strap sizes, owners can move the watch between a steel bracelet, a rubber dive strap, a NATO strap, or a leather band without hunting for unusual hardware. That flexibility is one of the practical reasons the 5 Sports SKX platform has stayed popular as a daily-wear watch.

 

• Bracelet: Stainless steel, matched to the case finish
• Lug Width: 22mm, widely supported by third-party strap makers
• Strap Options: Rubber, NATO, leather, and mesh all fit without adapters

 

The SEIKO 5 Sports Auto SRPD63K1 is best suited for buyers who want a mechanical automatic watch with dive-watch styling, a legible green dial, and a 42.5mm stainless steel case they can wear daily. For those who prefer winding their own watch, tracking elapsed time on a rotating bezel, and swapping straps to change the look, the SRPD63K1 covers those needs without a quartz battery or a specialist maintenance schedule.

Specifications of SEIKO 5 Sports Auto

Brand Name	Seiko
Model number	SRPD63K1
Part Number	SRPD63K1
Item Shape	Round
Dial window material type	Hardlex Crystal
Case diameter	42.00
Case Thickness	6 millimeters
Band Color	Metallic
Bezel material	Stainless?steel
Movement	Japanese Automatic
Water resistant depth	100 Meters
Display Type	Analog

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Specifications
[Brand Name ]	Seiko
[Model number ]	SRPD63K1
[Part Number ]	SRPD63K1
[Item Shape ]	Round
[ Dial window material type ]	Hardlex Crystal
[Case diameter ]	42.00
[Case Thickness ]	6 millimeters
[Band Color ]	Metallic
[Bezel material ]	Stainless?steel
[ Movement ]	Japanese Automatic
[ Water resistant depth ]	100 Meters
[Display Type ]	Analog

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