Is this an original Duemilanove?

Bon Giorno,

Dont know if this is a genuine Duemilanove, i have inspect it and passes several checks, but there are things like one of the perforations on the tab is smaller than the other, or the pair of capacitors seems strange. Also, the voltage regulator.

Saludos!

Hard to say, this one looks like genuine or very good clone. I think, that the parts can differ in time. The most suspicious thing for me is the 16V voltage of capacitors. I remember that the PCBs of older models were available on market.