Seiko Cal. 7178 - 981

This Hand-Winding model from 1975 features a 46mm PVD Black case. Powered by the 7178 caliber with 26j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-8758e527b4bc]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1975

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