Seiko Cal. 5637 - 638

Released in 1975, the Cal. 5637 with design code 638 was part of Seiko's domestic market collection. It features a White dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-133e33f2d417]

Also known as: UFO, Emperor

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1975

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