Seiko Cal. 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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