Seiko Cal. 6378 - 971

This Spring Drive model from 1991 features a 34mm Titanium case. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-74a4d248af0d]

Also known as: Bullhead, UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1991

Related Models

• Seiko 6365-538
• Seiko 6157-137
• Seiko 5265-453
• Seiko 4558-545
• Seiko 6110-959
• Seiko 4542-965
• Seiko 4424-699
• Seiko 7048-636
• Seiko 6194-776
• Seiko 5618-125
• Seiko 4464-105
• Seiko 6185-456