Seiko Cal. 6639 - 325

The Seiko 6639-325 represents an important milestone in Seiko's 1972 lineup. It features a White dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-1b9a12a3fa29]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1972

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