Seiko Cal. 6640 - 457

Seiko 6640-457

The 6640-457 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6640 caliber with 35j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-f5baac5787bc]

Also known as: Monster, Panda

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
43mm
Case Thickness
8.2mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
190m
Dial Color
Black
Jewels
35j
Frequency
36,000 bph
Power Reserve
59 hours
Year
1977

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