Seiko Cal. 5638 - 996

The Seiko 5638-996 represents an important milestone in Seiko's 1983 lineup. Powered by the 5638 caliber with 35j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-0a53e2c32535]

Also known as: Helmet, Bellmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

35j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1983

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