Seiko Cal. 6639 - 370

The 6639-370 is a sought-after Quartz piece from Seiko's golden era. The Fixed bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-1ce564fbc518]

Also known as: Turtle

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1974

Related Models

• Seiko 4452-245
• Seiko 4470-660
• Seiko 3818-217
• Seiko 6191-312
• Seiko 7169-378
• Seiko 4414-679
• Seiko 5642-125
• Seiko 6239-929
• Seiko 7014-491
• Seiko 6367-193
• Seiko 4443-102
• Seiko 0765-273