Canon Knowledge Base - How to locate the serial number on the lens
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What does the serial number mean on your Canon lens?
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Where to find your serial number - Canon Europe - Canon Europe
What does the serial number mean on your Canon lens?
☆Mint+☆Canon EF-S Lens 18-55mm F3.5-5.6 IS STM Serial number 194204030075 Tested | eBay
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