Seiko Cal. 6337 - 726

This Spring Drive model from 1968 features a 35mm Hardlex-Coated Steel case. Powered by the 6337 caliber with 36j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-c2d49dc330a3]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1968

Related Models

• Seiko 0737-694
• Seiko 6326-451
• Seiko 6361-783
• Seiko 4445-967
• Seiko 4482-947
• Seiko 7192-337
• Seiko 6237-849
• Seiko 4489-401
• Seiko 7199-475
• Seiko 6255-742
• Seiko 6124-892
• Seiko 4517-166