Grada,
It seems there is some variation on where the production date is stamped into the Brunella machines, but on mine it is small, but stamped into the casting.
On my 110v (older machine with no thermostat), the date is stamped on the side small ridge of the heating element. It takes some effort to see it, you may need a flashlight or magnifier. On my 220v machine (with pilot light and thermostat) it is stamped on the underside of the base just behind the drip tray area.
Yes, in both cases, you will need to remove the bottom plate to access the underside of the machine to find the date stamp. I have tried to show this in my posting of the 2 Brunellas, on the 3rd and 4th photos. It is much easier to see the stamp on the 220v machine. Take a look here:
A tale of two brunellas.
Let us know how things are going between the two machines, pics would be nice too...it would be great to add them to that posting I started! Look forward to hearing more,
Tyler