Seiko Cal. 5631 - 613

The 5631-613 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5631 caliber with 35j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-eb6770bd8194]

Also known as: Shogun, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

35j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1982

Related Models

• Seiko 4433-929
• Seiko 6378-536
• Seiko 6147-609
• Seiko 6684-421
• Seiko 7151-715
• Seiko 6660-464
• Seiko 6689-454
• Seiko 6261-428
• Seiko 5244-675
• Seiko 5611-988
• Seiko 6660-896
• Seiko 4529-806