Seiko Cal. 6378 - 496

The 6378-496 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6378 caliber with 17j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-6b6492fea0d6]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1986

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