Seiko Cal. 3815 - 788

The 3815-788 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-d6561ca790b7]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

35j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1978

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