Seiko Cal. 6131 - 997

This Spring Drive model from 1968 features a 42mm Titanium case. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-158226d538a1]

Also known as: Bellmatic, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

24j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1968

Related Models

• Seiko 5262-665
• Seiko 6134-590
• Seiko 4595-891
• Seiko 0796-351
• Seiko 6291-255
• Seiko 5253-548
• Seiko 7017-115
• Seiko 6329-569
• Seiko 7121-914
• Seiko 5214-222
• Seiko 0775-928
• Seiko 5251-721