Seiko Cal. 6393 - 437

The Seiko 6393-437 represents an important milestone in Seiko's 1967 lineup. Powered by the 6393 caliber with 23j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-8c1a02050fd7]

Also known as: Tuna, Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

23j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1967

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