Seiko Cal. 6661 - 400

The 6661-400 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6661 caliber with 32j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-b8ef8511ce3f]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1990

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