Seiko Cal. 4436 - 378

The Seiko 4436-378 represents an important milestone in Seiko's 1966 lineup. It features a Navy dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-7cfbcf0ad07c]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1966

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