Approximate age for Burnham gas fired boiler

All I know is that it is a model
Holiday #7-22
no serial numbers were present on this boiler.
Hopefully the pic comes thru.
I don’t need an exact date just a ballpark.

Hey, Ron.

The picture didn’t come through, and without the serial number, I haven’t a clue on that one.

Thanks Russ there was no serial number on the unit was just wondring if someone had an idea as to when they stopped making that particular model Burnham Holiday