Seiko Cal. 5637 - 320

The Seiko 5637-320 represents an important milestone in Seiko's 1989 lineup. Powered by the 5637 caliber with 18j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-ae6a55ac79ca]

Also known as: Bellmatic, Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1989

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