Seiko Cal. 3851 - 552

Released in 1971, the Cal. 3851 with design code 552 was part of Seiko's domestic market collection. It features a Green dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-e5476e63d7be]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1971

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