Seiko Cal. 3866 - 243

The 3866-243 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3866 caliber with 23j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-e960188ffc2b]

Also known as: Helmet, Rally

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1970

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