Seiko Cal. 3874 - 685

Seiko 3874-685

The 3874-685 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3874 caliber with 33j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-3df51bfdce20]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
14.1mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Black
Jewels
33j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1987

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