Seiko Cal. 5660 - 740

The Seiko 5660-740 represents an important milestone in Seiko's 1972 lineup. It features a Navy dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-030032e2baba]

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1972

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