Seiko Cal. 6637 - 197

Released in 1990, the Cal. 6637 with design code 197 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-30df762ff914]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1990

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