Seiko Cal. 6628 - 388

The Seiko 6628-388 represents an important milestone in Seiko's 1969 lineup. It features a Green dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-26be4b4b2fde]

Also known as: Monster, Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1969

Related Models

• Seiko 6237-694
• Seiko 4530-441
• Seiko 7187-951
• Seiko 6616-471
• Seiko 6659-338
• Seiko 5683-715
• Seiko 7150-831
• Seiko 7166-454
• Seiko 6112-472
• Seiko 7015-538
• Seiko 5256-440
• Seiko 3883-813