Seiko Cal. 6660 - 321

The 6660-321 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-99f0b67c486b]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Navy

Jewels

29j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1972

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