Seiko Cal. 6637 - 507

The Seiko 6637-507 represents an important milestone in Seiko's 1975 lineup. Powered by the 6637 caliber with 25j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-aa79f2fafde8]

Also known as: Panda, Emperor

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1975

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