Seiko Cal. 6391 - 656

The Seiko 6391-656 represents an important milestone in Seiko's 1966 lineup. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-729dceb0f674]

Also known as: Rally, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1966

Related Models

• Seiko 5264-881
• Seiko 6397-827
• Seiko 7198-129
• Seiko 0712-268
• Seiko 4470-135
• Seiko 0711-225
• Seiko 6243-995
• Seiko 6223-138
• Seiko 5293-684
• Seiko 5677-720
• Seiko 4467-868
• Seiko 3861-702