Seiko Cal. 6637 - 873

The Seiko 6637-873 represents an important milestone in Seiko's 1988 lineup. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-5211217dfc1c]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1988

Related Models

• Seiko 6179-858
• Seiko 7141-787
• Seiko 7143-414
• Seiko 3882-519
• Seiko 5284-955
• Seiko 6397-842
• Seiko 4513-367
• Seiko 5288-674
• Seiko 0737-340
• Seiko 4417-648
• Seiko 3893-574
• Seiko 0790-611