Seiko Cal. 3858 - 647

Seiko 3858-647

The 3858-647 is a sought-after Solar piece from Seiko's golden era. Powered by the 3858 caliber with 35j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-4fd3b99a0107]

Also known as: Bullhead, World Timer

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
43mm
Case Thickness
8.0mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Cream
Jewels
35j
Frequency
36,000 bph
Power Reserve
56 hours
Year
1978

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