Seiko Cal. 6637 - 896

This Hand-Winding model from 1977 features a 43mm Hardlex-Coated Steel case. Powered by the 6637 caliber with 35j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-5155222e94a7]

Also known as: Turtle, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Black

Jewels

35j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1977

Related Models

• Seiko 6130-824
• Seiko 6388-847
• Seiko 6173-366
• Seiko 6396-164
• Seiko 7167-785
• Seiko 3859-108
• Seiko 6390-316
• Seiko 6656-867
• Seiko 6660-189
• Seiko 6213-198
• Seiko 0783-546
• Seiko 7155-203