Seiko Cal. 6638 - 345

The 6638-345 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-5d3572e7a0b4]

Also known as: UFO, Arnie

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1971

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