lens – How to identify the original manufacturer of Focal brand lenses (Kmart)?

There are Focal brand goals for which I want to identify the manufacturer.

I've read that Focal is the Kmart home brand for optical equipment (cameras, lenses, binoculars, etc.). They also seem to have coded the manufacturer in the serial number. In principle, I simply need to find a list of applicable manufacturer codes. I have until now been unable to find such a list.

What are the manufacturer's codes for lenses that have been renamed Focal (Kmart)?