Seiko Cal. 5638 - 498

The Seiko 5638-498 represents an important milestone in Seiko's 1976 lineup. Powered by the 5638 caliber with 34j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-28e6f41381e9]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Burgundy

Jewels

34j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1976

Related Models

• Seiko 6239-791
• Seiko 6227-447
• Seiko 3853-719
• Seiko 6246-978
• Seiko 7179-867
• Seiko 6322-906
• Seiko 6687-488
• Seiko 7142-914
• Seiko 5235-828
• Seiko 6331-960
• Seiko 5663-385
• Seiko 3883-808