Seiko Cal. 4436 - 290

This Spring Drive model from 1971 features a 40mm Two-Tone case. It features a Black dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-e013ada8c9c5]

Also known as: Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1971

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