Seiko Cal. 0721 - 939

The 0721-939 is a sought-after Automatic piece from Seiko's golden era. Powered by the 0721 caliber with 20j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-fb58ba78230b]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

20j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1965

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