Seiko Cal. 4436 - 640

The Seiko 4436-640 represents an important milestone in Seiko's 1985 lineup. Powered by the 4436 caliber with 35j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-449b3e07f264]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Cream

Jewels

35j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1985

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