Seiko Cal. 5671 - 231

The 5671-231 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5671 caliber with 22j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-50aaf2a36a96]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1982

Related Models

• Seiko 5282-819
• Seiko 7148-689
• Seiko 7033-124
• Seiko 6680-346
• Seiko 4429-661
• Seiko 4550-468
• Seiko 4541-333
• Seiko 6243-382
• Seiko 6665-130
• Seiko 0744-401
• Seiko 7043-211
• Seiko 7175-735