Check the serial and model numbers
Inspect the dial text and logo for sharpness and alignment
Examine the cyclops magnification over the date
Look for smooth sweeping movement of the second hand
Verify the weight and overall feel
Inspect the crown and engravings
Check the bracelet and clasp quality
Look for the rehaut engraving
Test the lume and lume consistency
Compare the watch to official Rolex references
Verify the movement with a watchmaker
Check the box, papers, and warranty card
Buy only from authorized or trusted sellers