Seiko Cal. 6691 - 543

Released in 1973, the Cal. 6691 with design code 543 was part of Seiko's domestic market collection. It features a Silver dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-d8d0df4df153]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

35j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1973

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