Panel Age for a 4-point

I need some help determining the age of these panels and panels in general your help would be appreciated,

What year is the home?

It was built in 1978

They appear to be within the last decade or so. In the 4 point, I would just put 10-15 year (estimate)
I used to just put “unknown”, but I was getting calls from insurance, and they say just to put a guess and comment “estimate”.
They can’t blame you if it’s all just a WAG anyways…