Seiko Cal. 7155 - 637

The 7155-637 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7155 caliber with 25j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-ecceea1fcd3f]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1999

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