Seiko Cal. 4539 - 654

Seiko 4539-654

The 4539-654 is a sought-after Solar piece from Seiko's golden era. Powered by the 4539 caliber with 25j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-a31a04acea15]

Also known as: UFO

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
38mm
Case Thickness
8.5mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
30m
Dial Color
Black
Jewels
25j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1974

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