Seiko Cal. 3821 - 761

The 3821-761 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3821 caliber with 31j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-d0c3aead6ab3]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Champagne

Jewels

31j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1971

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