Seiko Cal. 4436 - 645

The 4436-645 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-6d3f4f8684b7]

Also known as: Bellmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1971

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