Model numbers and size markings are important identifiers found on Cartier eyewear. These markings can help identify a specific frame, but they should always be evaluated together with the physical characteristics and construction of the eyewear.
What to Look For
Depending on the model and production period, markings may include:
- Model or reference number
- Color code
- Lens width
- Bridge width
- Temple length
- Material information
- Country of manufacture
- Production or serial codes
Understanding Frame Size Markings
Eyewear size measurements are commonly expressed in millimeters.
For example:
56 □ 19 135
This generally represents:
- 56 mm — Lens width
- 19 mm — Bridge width
- 135 mm — Temple length
However, the exact markings and format can vary depending on the Cartier model and production period.
Model Reference Numbers
A model or reference number should correspond to the specific frame design. When comparing markings, check that the reference number is consistent with:
- Frame shape
- Collection or model name
- Color and finish
- Lens configuration
- Size measurements
- Construction details
A correct-looking number alone does not guarantee authenticity. Counterfeit frames may copy reference numbers from genuine Cartier eyewear.
Font, Spacing & Engraving
Authentic markings should generally appear clean and consistently applied. Pay attention to:
- Font style
- Letter and number spacing
- Alignment
- Engraving quality
- Depth and clarity
- Consistency with other markings on the frame
Be cautious of poorly printed, uneven, misaligned, or inconsistent markings.
Important Notice
Model numbers and size markings should never be used as the only method of authentication.
For a reliable evaluation, compare multiple characteristics together, including temple markings, nose bridge details, hardware, materials, construction, and overall craftsmanship. Whenever possible, compare the frame with verified examples of the same model.