Seiko Cal. 6657 - 207

Seiko 6657-207

The Seiko 6657-207 represents an important milestone in Seiko's 1977 lineup. Powered by the 6657 caliber with 17j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-97d8a2e83b65]

Also known as: Turtle, Crown

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
15.0mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
150m
Dial Color
Burgundy
Jewels
17j
Frequency
36,000 bph
Power Reserve
55 hours
Year
1977

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