Seiko Cal. 5621 - 510

The Seiko 5621-510 represents an important milestone in Seiko's 1971 lineup. Powered by the 5621 caliber with 21j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-bba65877589e]

Also known as: Helmet, Silverwave

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Silver

Jewels

21j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1971

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