Seiko Cal. 7021 - 857

Released in 1966, the Cal. 7021 with design code 857 was part of Seiko's domestic market collection. With its 21mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-497ca8dc1a8f]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1966

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