Seiko Cal. 6639 - 150

The 6639-150 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-f53d17e7a44b]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1975

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