Seiko Cal. 5285 - 312

Seiko 5285-312

The 5285-312 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5285 caliber with 17j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-31a0977ce36b]

Also known as: Monster, Helmet

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
34mm
Case Thickness
12.7mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
190m
Dial Color
White
Jewels
17j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1978

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seikata-wm-31a0977ce36b