Seiko Cal. 6381 - 694

This Spring Drive model from 1988 features a 41mm Two-Tone case. Powered by the 6381 caliber with 30j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-eb8459b1e29b]

Also known as: Tuna, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1988

Related Models

• Seiko 6294-238
• Seiko 6279-430
• Seiko 7093-303
• Seiko 6144-822
• Seiko 7056-455
• Seiko 6275-189
• Seiko 7194-194
• Seiko 7196-156
• Seiko 4488-943
• Seiko 6262-967
• Seiko 0758-232
• Seiko 7098-665