Seiko Cal. 6640 - 701

Released in 1975, the Cal. 6640 with design code 701 was part of Seiko's domestic market collection. With its 19mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-1234090b24e8]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1975

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