Seiko Cal. 3821 - 366

Released in 1968, the Cal. 3821 with design code 366 was part of Seiko's domestic market collection. It features a White dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-0cc6ec12234e]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1968

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