Seiko Cal. 5681 - 988

This Hand-Winding model from 1965 features a 37mm Two-Tone case. Powered by the 5681 caliber with 29j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-bc77c55c322e]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1965

Related Models

• Seiko 6354-698
• Seiko 6617-107
• Seiko 7094-800
• Seiko 0767-896
• Seiko 6294-687
• Seiko 6345-496
• Seiko 0725-124
• Seiko 6293-789
• Seiko 5226-338
• Seiko 4449-204
• Seiko 7064-530
• Seiko 3857-856