Seiko Cal. 7121 - 817

The 7121-817 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7121 caliber with 36j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-774ae65616d2]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1965

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