Seiko Cal. 6691 - 358

The 6691-358 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6691 caliber with 24j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-110637591ddb]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1971

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