Seiko Cal. 5637 - 409

The 5637-409 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5637 caliber with 29j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-487bff984c75]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1998

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