Seiko Cal. 3864 - 721

Seiko 3864-721

The 3864-721 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3864 caliber with 34j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-30f04fc4ef28]

Also known as: Bellmatic

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
190m
Dial Color
Black
Jewels
34j
Frequency
36,000 bph
Power Reserve
55 hours
Year
1969

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