Seiko Cal. 6637 - 927

The 6637-927 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6637 caliber with 17j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-9e6ccc43ec37]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1972

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