Seiko Cal. 6390 - 757

The 6390-757 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6390 caliber with 27j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-1feb05229630]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1981

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