Seiko Cal. 7154 - 138

The 7154-138 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7154 caliber with 21j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-21b2213539fb]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1972

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