Seiko Cal. 7153 - 638

The 7153-638 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7153 caliber with 24j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-adf8eafdc20e]

Also known as: Helmet, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1989

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