Seiko Cal. 7145 - 839

Seiko 7145-839

The 7145-839 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7145 caliber with 30j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-0aa1f4cd7eb9]

Also known as: Monster, Sumo

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
37mm
Case Thickness
11.1mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
170m
Dial Color
White
Jewels
30j
Frequency
36,000 bph
Power Reserve
46 hours
Year
1997

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