Seiko Cal. 6121 - 637

The 6121-637 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-c45786b5224a]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1977

Related Models

• Seiko 7048-936
• Seiko 6371-387
• Seiko 6162-441
• Seiko 5688-265
• Seiko 3863-395
• Seiko 0794-435
• Seiko 6312-901
• Seiko 4496-396
• Seiko 3842-391
• Seiko 7161-887
• Seiko 6396-193
• Seiko 6119-756