Seiko Cal. 3817 - 540

The 3817-540 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3817 caliber with 21j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-11210e398492]

Also known as: World Timer, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1985

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