Seiko Cal. 5642 - 816

This Spring Drive model from 1974 features a 35mm Two-Tone case. Powered by the 5642 caliber with 34j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-e8dd60750aaa]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1974

Related Models

• Seiko 6298-974
• Seiko 3861-443
• Seiko 3861-913
• Seiko 7156-953
• Seiko 7044-355
• Seiko 0790-928
• Seiko 7156-686
• Seiko 7154-258
• Seiko 7031-917
• Seiko 6130-363
• Seiko 4527-576
• Seiko 0782-864