Seiko Cal. 6644 - 937

Released in 1971, the Cal. 6644 with design code 937 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-56ce0eaf8b82]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1971

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