Seiko Cal. 5640 - 971

The 5640-971 is a sought-after Solar piece from Seiko's golden era. With its 22mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-40aa22eebd89]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1978

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