Seiko Cal. 5257 - 720

The Seiko 5257-720 represents an important milestone in Seiko's 1970 lineup. Powered by the 5257 caliber with 23j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-597385bd6964]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1970

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