Rolex Explorer II Authentication Guide

The Rolex Explorer II, reference 16570, is a highly regarded model known for its durability and functionality. Ensuring its authenticity is crucial before making a purchase or sale. In this guide, we will walk you through the comprehensive process of authenticating a Rolex Explorer II.

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• Introduction: A customer is selling a polar explorer model Rolex, which needs a thorough inspection to confirm its authenticity.
• Initial Inspection: The bracelet is removed to check the reference number, 16570. An indentation on both sides of the bracelet is noticed, a common sign of an authentic older model due to the hollow NVLink design.
• Serial Number Verification: The serial number begins with “A,” indicating it’s a late 1990s piece, around 1999. Using ChatGPT, the correct bracelet code is confirmed to be 78790 with 501B endlinks, a positive sign of authenticity.
• Screw and Lug Examination: The screws are checked for chamfer edges, a 45-degree angle indicative of Rolex’s high-quality finishing. The lugs are also inspected for polish, showing a reasonable amount of polishing for its age. The overall condition is rated 7 to 7.5 out of 10.
• Dial Analysis: The dial reads “Swiss” at the 6 o’clock position, known as a “Swiss only” dial. This is cross-referenced with other examples from the same period, confirming it could be correct for the model.
• Movement Inspection: After opening the case back, the movement is examined. The screws show signs of being turned, indicating previous servicing, which is expected for a nearly 20-year-old watch. The movement looks clean and well-maintained.
• Case Back Check: The case back is scrutinized for even and perfect stampings, with no double stampings. The circular finishing on the case back starts perfectly at the center, resembling a bullseye, confirming its authenticity.
• Timekeeping Test: The watch is tested on a time grapher, showing an amplitude of 220 and a rate of +9 seconds per day, which is consistent and acceptable for a watch of its age.
• Conclusion: The watch is confirmed to be authentic based on the detailed inspection. It will be sold to the next customer, with the option for further adjustments if needed for more accurate timekeeping.

Authenticating a Rolex Explorer II involves several meticulous steps to ensure every detail is verified. By following these steps, you can confidently determine the authenticity of your Rolex Explorer II. If you have any specific watches you’d like to see authenticated in future videos, please reach out to us. Thank you for watching and trusting our expertise with your luxury watch needs.