I'd say mid 00's
They had the black "Z" right before they started with the plain black (no white threads) zegna logo.
Here's the one that came after.
Many thanks! I thought it might be newer as the coat is perfect. Must have sat in someone's closet with minimal use.
There are a number of threads on Z Zega suit construction, but most data points to a fused garment. At $250 it's a decent price. I don't believe Zegan calls out the type of construction in the tag AFAIK.
Many thanks. I searched for a forum like that but came up empty. Sorry for going all non-Zegna here.