Seiko Cal. 6657 - 336

Released in 1970, the Cal. 6657 with design code 336 was part of Seiko's domestic market collection. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-76feadb96575]

Also known as: UFO, Goldfeather

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1970

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