Seiko Cal. 5683 - 438

The Seiko 5683-438 represents an important milestone in Seiko's 1974 lineup. Powered by the 5683 caliber with 29j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-bd6ff5e79874]

Also known as: Helmet, World Timer

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1974

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