Seiko Cal. 6660 - 381

Released in 1978, the Cal. 6660 with design code 381 was part of Seiko's domestic market collection. It features a Cream dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-e2ab3bc825ca]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1978

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