This mystery wine is Yalumba Old Bush Vine Grenache 2016
If using the AmEx WineStar offer, buy a $150 gift voucher first to receive $50 credit back, then pay for the wine with that voucher
For those with multiple offers/cards, consider Philipponnat Clos des Goisses 1992/1998/1999 $299 before credit back (2008: $435 elsewhere)
Clos des Goisses was the first single-vineyard grande marque Champagne, a more recent famously expensive example being Krug Clos d'Ambonnay
The 1992 is my favourite Clos des Goisses vintage (96pts) and a towering masterpiece (97pts)
Champagne Seeks to Discover Itself in Single-Vineyard Wines
The single-vineyard champagnes reaching new highs
Nice wine, bargain price. The Amex credit is $50 for $150 spend (not $30). Cheers.