How to tell the age of a panel

Im having a hard time determining the age of Electrical Panels. Anyone have any suggestions on doing this an easy way ?

Why would you want to know?
Just askin’.
The age of the home could give you a hint .

The 4 Point Inspection in Florida requires the age of the Panel.

If the panel has an approval mark or sticker that was applied (by the AHJ) when it was installed, it might show the date of approval.

Fuse Panel and Knob and tube wiring Old as Roy
Breaker Panel newer than Roy
Age of home , sticker like others said
BTW good luck being 100 percent sure

Then it would be a Citizen form you are using.
And not all Florida forms require the age of the panel.
I use the Tower Hill and it is a better form IMHO.