Seiko Cal. 6637 - 518

The Seiko 6637-518 represents an important milestone in Seiko's 1984 lineup. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-e1751e1c7e40]

Also known as: Bullhead, Arnie

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1984

Related Models

• Seiko 6621-831
• Seiko 5251-954
• Seiko 6332-965
• Seiko 6180-184
• Seiko 0786-135
• Seiko 4595-533
• Seiko 6380-634
• Seiko 6327-606
• Seiko 6358-159
• Seiko 6385-734
• Seiko 4468-196
• Seiko 6150-298