Seiko Cal. 6637 - 618

This Automatic model from 1977 features a 42mm Two-Tone case. Powered by the 6637 caliber with 35j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-ecdcee13a7f3]

Also known as: Arnie

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

35j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1977

Related Models

• Seiko 5698-691
• Seiko 6298-958
• Seiko 6221-291
• Seiko 6618-419
• Seiko 6662-738
• Seiko 0783-730
• Seiko 5291-913
• Seiko 6270-273
• Seiko 0729-131
• Seiko 6175-717
• Seiko 4568-633
• Seiko 6387-243