Seiko Cal. 5257 - 620

The Seiko 5257-620 represents an important milestone in Seiko's 1971 lineup. Powered by the 5257 caliber with 19j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-ab2ddd96c676]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1971

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