Seiko Cal. 4438 - 559

This Spring Drive model from 1979 features a 40mm Stainless Steel case. Powered by the 4438 caliber with 27j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-b44bc8c651af]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1979

Related Models

• Seiko 0722-921
• Seiko 0722-911
• Seiko 4535-873
• Seiko 7084-454
• Seiko 6328-786
• Seiko 3849-521
• Seiko 6335-325
• Seiko 7152-721
• Seiko 4512-864
• Seiko 3863-844
• Seiko 6245-603
• Seiko 6228-855