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This Big Bang Unico Carbon Chronograph has been authenticated and evaluated by our expert watchmakers through a comprehensive 10-step process. A complete condition report is provided with your purchase at your request.

Every timepiece "Greenwich Time" buys and sells is carefully inspected by our in-house team of Swiss-trained watchmakers and certified authentic before it is available for sale. With an in-house team of 4 watchmakers, technicians, polishers and over 30,000 watches bought and sold through the decades, authenticity has always been a top priority.

Every watch we have ever sold is delivered with a lifetime promise of authenticity.