Seiko Cal. 5637 - 928

Released in 1975, the Cal. 5637 with design code 928 was part of Seiko's domestic market collection. With its 20mm lug width and 13.2mm profile, it sits comfortably on most wrists. [seikata-wm-a4f5ebeb8edf]

Also known as: Panda, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1975

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