Seiko Cal. 6636 - 187

Released in 1971, the Cal. 6636 with design code 187 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-ee4af0d9f8aa]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1971

Related Models

• Seiko 6113-444
• Seiko 5277-198
• Seiko 4582-114
• Seiko 3883-302
• Seiko 6197-978
• Seiko 7166-316
• Seiko 7017-158
• Seiko 6645-721
• Seiko 6626-554
• Seiko 4441-662
• Seiko 4586-521
• Seiko 6355-227