Seiko Cal. 5645 - 737

Released in 1975, the Cal. 5645 with design code 737 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-8ba3ce61a5e3]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1975

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