Seiko Cal. 6397 - 720

The 6397-720 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-60db55fb0f3b]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

31j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1978

Related Models

• Seiko 6642-509
• Seiko 7162-436
• Seiko 6611-155
• Seiko 6645-282
• Seiko 7136-184
• Seiko 3833-429
• Seiko 6196-426
• Seiko 6278-953
• Seiko 6673-212
• Seiko 5639-906
• Seiko 7117-822
• Seiko 5241-544