Seiko Cal. 6657 - 439

The Seiko 6657-439 represents an important milestone in Seiko's 1969 lineup. With its 18mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-440506041924]

Also known as: Panda

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1969

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