Seiko Cal. 6660 - 537

The Seiko 6660-537 represents an important milestone in Seiko's 1969 lineup. It features a White dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-8bec0635b9c8]

Also known as: Sumo, Panda

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1969

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