Seiko Cal. 6665 - 391

The Seiko 6665-391 represents an important milestone in Seiko's 1969 lineup. Powered by the 6665 caliber with 26j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-fb7caf940e60]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

26j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1969

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