Seiko Cal. 4436 - 643

The Seiko 4436-643 represents an important milestone in Seiko's 1976 lineup. Powered by the 4436 caliber with 33j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-a1e2abe14bdb]

Also known as: Arnie

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1976

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