Seiko Cal. 5248 - 657

This Spring Drive model from 1977 features a 37mm Hardlex-Coated Steel case. Powered by the 5248 caliber with 31j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-2528d776fea1]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1977

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