Seiko Cal. 4528 - 412

Seiko 4528-412

The 4528-412 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4528 caliber with 27j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-af27f16ea928]

Also known as: Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
44mm
Case Thickness
8.6mm
Lug Width
22mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Navy
Jewels
27j
Frequency
36,000 bph
Power Reserve
47 hours
Year
1989

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