Seiko Cal. 4439 - 863

Seiko 4439-863

The 4439-863 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4439 caliber with 31j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-2bd6dad624df]

Also known as: Tuna, Bullhead

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
12.0mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
Navy
Jewels
31j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1968

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