Seiko Cal. 7142 - 509

Seiko 7142-509

The 7142-509 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7142 caliber with 21j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-d756f13a9fd8]

Also known as: Helmet

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
36mm
Case Thickness
9.6mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Silver
Jewels
21j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1978

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