Seiko Cal. 6381 - 636

The Seiko 6381-636 represents an important milestone in Seiko's 1991 lineup. Powered by the 6381 caliber with 28j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-45d0f0ce810d]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1991

Related Models

• Seiko 0741-673
• Seiko 6339-115
• Seiko 0764-431
• Seiko 4423-225
• Seiko 6653-280
• Seiko 6388-629
• Seiko 7081-610
• Seiko 7149-935
• Seiko 6259-147
• Seiko 6125-447
• Seiko 6673-930
• Seiko 3894-828