Seiko Cal. 3816 - 577

The Seiko 3816-577 represents an important milestone in Seiko's 1965 lineup. It features a Black dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-7098101606d9]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1965

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