Seiko Cal. 6631 - 215

The 6631-215 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-e6a4a20998ff]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1971

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