Seiko Cal. 6618 - 438

The 6618-438 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6618 caliber with 34j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-cf2fcc198c0f]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1980

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