Seiko Cal. 3878 - 121

The 3878-121 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3878 caliber with 35j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-ca59bcdfc83b]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1965

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