One is the frame manufacturer's, and one is the brand's. Keep a record of them both I'd say. The mfr will have a system of numbering they use, and the brand will have another - so the manufacturer stamps both on the shell.
@sam_singular started
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One is the frame manufacturer's, and one is the brand's. Keep a record of them both I'd say. The mfr will have a system of numbering they use, and the brand will have another - so the manufacturer stamps both on the shell.