The Complete Guide to Rolex Serial Numbers and Production Years

The Complete Guide to Rolex Serial Numbers and Production Years

One of the most common—and valuable—questions in the watch world is:
“What year was my Rolex made?”

Knowing the production year can help verify authenticity, confirm originality, and track market value over time. Whether you’re a collector, investor, or just curious, understanding Rolex serial numbers is essential.

At Investment Watches, we use serials to authenticate and appraise every Rolex we sell. Here’s how to read them like a pro in 2025.

📍 What Is a Rolex Serial Number?

Every Rolex has a unique serial number that indicates its place in the brand’s production history. It’s typically found:

• Pre-2007: Engraved between the lugs at 6 o’clock (behind the bracelet)

• Post-2007: Laser-etched on the rehaut (inner bezel ring)

This number allows you to date your watch and confirm it wasn’t tampered with or altered.

📆 Rolex Serial Number Production Chart

Here’s a simplified lookup table for estimating production years:

Alphabet Prefix (1987–2010)

In the late 1980s, Rolex began using letter prefixes before switching to random serials in 2010:

🔄 Random Serial Numbers (Post-2010)

In 2010, Rolex switched to randomized serials, meaning you can no longer date the watch by serial number alone. This was done to increase security and reduce counterfeiting.

In these cases, the warranty card or original sales invoice becomes the best way to determine the production year.

🕵️♂️ How to Use Serial Numbers for Authentication

1. Check the location: If it’s missing from both the lugs and rehaut, that’s a red flag

2. Match to model: Confirm the serial number fits the era of the reference number

3. Engraving quality: Genuine Rolex engravings are sharp, consistent, and perfectly aligned

4. Cross-check with papers: Authentic sets match the serial to the card/booklet

Final Thoughts

Knowing your Rolex’s production year can help determine its market value, rarity, and investment potential. It’s also an essential part of any serious authentication process.

At Investment Watches, we date and authenticate every Rolex we sell—and we include full documentation to back it up. Whether you're buying, selling, or just exploring, your timepiece deserves this level of trust.