Seiko Cal. 6378 - 349

The 6378-349 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-c0db3698afa4]

Also known as: Tuna, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1971

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