Seiko Cal. 3820 - 630

The Seiko 3820-630 represents an important milestone in Seiko's 1975 lineup. Powered by the 3820 caliber with 24j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-6709c91a4361]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1975

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