Seiko Cal. 3853 - 521

Released in 1975, the Cal. 3853 with design code 521 was part of Seiko's domestic market collection. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-da3ee802ef0a]

Also known as: UFO, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1975

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