Seiko Cal. 6637 - 954

The 6637-954 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-0678abb23ed4]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1994

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