Seiko Cal. 5656 - 437

Seiko 5656-437

The 5656-437 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-bfa78d1b8aab]

Also known as: Turtle, Flighty

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
43mm
Case Thickness
13.8mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1980

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