Seiko Cal. 3870 - 565

This Solar model from 1977 features a 41mm Two-Tone case. It features a Navy dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-e8fd3b2b3144]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1977

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