Seiko Cal. 4436 - 565

The Seiko 4436-565 represents an important milestone in Seiko's 1977 lineup. Powered by the 4436 caliber with 17j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-9624a17e4da2]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

White

Jewels

17j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1977

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