Seiko Cal. 6688 - 712

The Seiko 6688-712 represents an important milestone in Seiko's 1978 lineup. Powered by the 6688 caliber with 35j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-ae008ee5caf7]

Also known as: Helmet, UFO

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1978

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