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Marathon General Purpose Mechanical (GPM) — a classic wristwatch that blends traditional mechanical character with modern technology. Built for maximum reliability and durability, it meets international standards of quality. The lightweight fibreshell case combined with a stainless steel back ensures strength, while the sapphire crystal provides scratch resistance. Powered by the Seiko NH35A movement with 24 jewels, it supports both automatic and manual winding, with a power reserve of up to 41 hours. Tritium illumination guarantees constant readability in darkness, and the simple matte black dial with a dual-scale layout makes the watch versatile for everyday wear or more formal occasions.
Advantages
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fibreshell + steel case — lightweight and durable
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sapphire crystal — scratch resistant
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tritium illumination — 24/7 visibility
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Seiko NH35A movement — accuracy and reliability
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41-hour power reserve — autonomy
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lightweight — only 25 g
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versatile design — fits any style
Functions
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manual and automatic winding
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tritium illumination
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12/24-hour time display
Specifications
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type: mechanical
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winding: manual + automatic
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case material: fibreshell + stainless steel 316L
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case diameter: 34 mm
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case thickness: 12.5 mm
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crystal: sapphire
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strap: nylon, 16 mm wide
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water resistance: 30 m (3 ATM)
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weight: 25 g
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compliance: MIL-SPEC, NSN