Seiko Cal. 6634 - 640

This Solar model from 1965 features a 36mm Two-Tone case. With its 18mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-f6ad4d7d2dcc]

Also known as: Crown, Emperor

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1965

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