Seiko Cal. 6620 - 412

This Hand-Winding model from 1975 features a 37mm Gold-Plated case. Powered by the 6620 caliber with 35j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-8ffe370b34b9]

Also known as: Tuna, Arnie

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1975

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