Seiko Cal. 6331 - 739

The Seiko 6331-739 represents an important milestone in Seiko's 1969 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-61bb55bc2a95]

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1969

Related Models

• Seiko 6634-486
• Seiko 6611-561
• Seiko 5282-537
• Seiko 4423-397
• Seiko 7144-639
• Seiko 0781-671
• Seiko 4445-132
• Seiko 7043-258
• Seiko 7186-244
• Seiko 4498-928
• Seiko 5611-516
• Seiko 6645-696