Seiko Cal. 6638 - 500

Released in 1978, the Cal. 6638 with design code 500 was part of Seiko's domestic market collection. It features a Cream dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-0d0f901c35f7]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1978

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