Seiko Cal. 3890 - 506

The 3890-506 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3890 caliber with 19j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-e0cb74a1c678]

Also known as: Monster, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1982

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