Every now and then, TTB likes to say stamps (and things looking like postage stamps) are not allowed. Don’t ask me why. Maybe they look like “government symbols” or endorsements. All I know for sure is that TTB has resisted, tooth and nail, on more than one occasion.
But if you have your heart set on using stamp imagery, it is well worth a try, as these many labels show. Benton-Lane is pinot noir from the Wilamette Valley. Times Ten is a cabernet-merlot blend from the Napa Valley. And here is Hardys Stamp of Australia Shiraz.