If you're unable to find the information you need on the JVC website, you can try the following alternative resources:

For newer JVC devices (after 2015), the date code is often the 5th through 8th characters. For example, in serial JVC-3D21L12345 , the "3D21" might decode to April 2021, 3rd revision.

If the device is powered on, you can often find the serial number in the system settings:

While JVC does not maintain a stolen goods database, you can ask the seller to provide the serial number, then call JVC business support. If the serial was originally sold to a rental house or school district and later "lost," that red flag will appear.