Seiko Cal. 6688 - 712

Seiko 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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