Seiko Cal. 6397 - 727

The Seiko 6397-727 represents an important milestone in Seiko's 1977 lineup. It features a Green dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-40730f67044a]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1977

Related Models

• Seiko 5228-525
• Seiko 0748-394
• Seiko 4421-652
• Seiko 6345-748
• Seiko 4526-833
• Seiko 4579-117
• Seiko 4564-507
• Seiko 4489-873
• Seiko 5252-372
• Seiko 6267-751
• Seiko 7040-465
• Seiko 6669-941