- Instrument Chronographs - Sinn World Time Chronograph 144 GMT St D (SN-121)
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This is the GMT version of Sinn's 144 instrument chronograph. The watch comes with Valjoux 7750 automatic calibre that performs 28 800 vibrations per hour and has 25 bearing jewels. The movement is protected from shock and magnetic influences. A white arrow hand is used to mark the second time zone. Additional features include a date window at the 3 o'clock mark, tachymeter and pulsometer scale, luminous dial elements, high and low pressure resistance, solid case back and scratch-resistant sapphire crystal glass with anti-reflective coating.
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