Seiko Cal. 6630 - 387

The Seiko 6630-387 represents an important milestone in Seiko's 1974 lineup. It features a Cream dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-f2ebf9000747]

Also known as: Sumo, Silverwave

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1974

Related Models

• Seiko 6119-580
• Seiko 4424-808
• Seiko 7137-916
• Seiko 0750-611
• Seiko 6196-442
• Seiko 4572-270
• Seiko 4580-139
• Seiko 6161-673
• Seiko 0786-474
• Seiko 7031-559
• Seiko 7017-905
• Seiko 6138-276