Seiko Cal. 6231 - 287

The Seiko 6231-287 represents an important milestone in Seiko's 1976 lineup. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-6994491a374a]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1976

Related Models

• Seiko 7145-944
• Seiko 6645-896
• Seiko 7023-771
• Seiko 6273-892
• Seiko 6192-267
• Seiko 0721-138
• Seiko 6217-307
• Seiko 6192-663
• Seiko 5267-109
• Seiko 7195-795
• Seiko 4550-548
• Seiko 0739-768