Seiko Cal. 7021 - 316

The 7021-316 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7021 caliber with 17j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-16a5a5a7d51b]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Silver

Jewels

17j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1995

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