Seiko Cal. 3870 - 254

The 3870-254 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3870 caliber with 29j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-9f30101f0c5c]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1990

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