Seiko Cal. 0748 - 178

The 0748-178 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0748 caliber with 31j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-ced7fc78903e]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

8.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1980

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