Seiko Cal. 5621 - 257

Released in 1981, the Cal. 5621 with design code 257 was part of Seiko's domestic market collection. Powered by the 5621 caliber with 17j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-bb52cd6257f9]

Also known as: Rally, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1981

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