Seiko Cal. 6631 - 205

The 6631-205 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6631 caliber with 31j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-655ddc5813ec]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1986

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