Seiko Cal. 3813 - 728

The 3813-728 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-f32c27e4fc4b]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1987

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