Seiko Cal. 3815 - 504

The Seiko 3815-504 represents an important milestone in Seiko's 1967 lineup. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-ca9e14fa8251]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1967

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