Seiko Cal. 3840 - 186

Released in 1966, the Cal. 3840 with design code 186 was part of Seiko's domestic market collection. It features a Champagne dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-1cd8705da600]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1966

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