Seiko Cal. 7170 - 646

This Spring Drive model from 1971 features a 39mm Hardlex-Coated Steel case. Powered by the 7170 caliber with 30j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-eb31f4da2883]

Also known as: Sumo, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1971

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