Seiko Cal. 6660 - 364

The Seiko 6660-364 represents an important milestone in Seiko's 1965 lineup. It features a White dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-f33971ee4ca5]

Also known as: Helmet, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1965

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