Seiko Cal. 4531 - 352

This Spring Drive model from 1971 features a 41mm Two-Tone case. It features a Green dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-e0c268d16e21]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1971

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