Seiko Cal. 5240 - 957

The Seiko 5240-957 represents an important milestone in Seiko's 1971 lineup. Powered by the 5240 caliber with 30j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-2bbdd0a5b8f2]

Also known as: Pogue, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1971

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