Seiko Cal. 3815 - 975

The 3815-975 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-949cc9d4f141]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1973

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