Seiko Cal. 3851 - 215

The 3851-215 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-4c589a3725c3]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1975

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