Seiko Cal. 6637 - 611

The 6637-611 is a sought-after Automatic piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-de0661ce82f5]

Also known as: Monster, Sportsmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1987

Related Models

• Seiko 5643-835
• Seiko 3822-986
• Seiko 7139-999
• Seiko 6287-942
• Seiko 4519-180
• Seiko 3834-112
• Seiko 0786-999
• Seiko 6214-893
• Seiko 6360-574
• Seiko 5279-139
• Seiko 6225-813
• Seiko 7142-341