Seiko Cal. 5637 - 445

Released in 1972, the Cal. 5637 with design code 445 was part of Seiko's domestic market collection. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-3710aca44bfe]

Also known as: Panda, Helmet

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1972

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