The serial number of an appliance typically consists of a combination of letters and numbers. Our decoding process involves many methods like cross referencing model numbers against public data and our database that maps the serial number to the manufacturing information.

In many cases, this information can be decoded manually by a trained professional. However in many more cases, it is impossible or very difficult to discern the age due to obscure serial number conventions, weathered model information and many more. It's worth noting that not all appliances have standardized serial numbers, and the decoding process can vary between brands and manufacturers. Some brands use different decoding methods or keep their serial numbers proprietary, making it difficult to determine the manufacturing information.