Seiko Cal. 6691 - 921

The Seiko 6691-921 represents an important milestone in Seiko's 1986 lineup. Powered by the 6691 caliber with 36j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-468023d34ac7]

Also known as: Panda, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1986

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