Seiko Cal. 3891 - 248

The 3891-248 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3891 caliber with 32j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-67e05aab2742]

Also known as: Helmet, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1974

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