Seiko Cal. 6181 - 990

The 6181-990 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6181 caliber with 25j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-2dbdad0bf567]

Also known as: Silverwave, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1973

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