Seiko Cal. 3874 - 421

Seiko 3874-421

The 3874-421 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3874 caliber with 32j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-2d78c9a5384a]

Also known as: Helmet, UFO

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
39mm
Case Thickness
14.3mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Silver
Jewels
32j
Frequency
28,800 bph
Power Reserve
66 hours
Year
1990

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