Seiko Cal. 3813 - 988

This Solar model from 1965 features a 37mm PVD Black case. It features a Silver dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-12dbc3c79f4b]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1965

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