Seiko Cal. 4421 - 681

This Solar model from 1968 features a 37mm Hardlex-Coated Steel case. It features a Navy dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-0acb9f4a062c]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1968

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