Seiko Cal. 6638 - 955

The 6638-955 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-df35a8a340fe]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1967

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