Seiko Cal. 6390 - 377

The 6390-377 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6390 caliber with 35j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-d000f6dd957a]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1990

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