Seiko Cal. 6628 - 664

The Seiko 6628-664 represents an important milestone in Seiko's 1973 lineup. It features a Navy dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-6a4173e24cbd]

Also known as: Monster, Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1973

Related Models

• Seiko 3875-280
• Seiko 5287-472
• Seiko 6348-340
• Seiko 4453-959
• Seiko 7077-690
• Seiko 6292-525
• Seiko 5672-122
• Seiko 7094-230
• Seiko 6360-197
• Seiko 6162-646
• Seiko 7158-869
• Seiko 0761-961