Seiko Cal. 6154 - 987

The 6154-987 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6154 caliber with 27j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-d58fdc930ac6]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1995

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