I've been heeding this tip from The Alice B. Toklas Cook Book, the classic, for decades, and my fondness for sweetbread, as Toklas writes, leads me regularly to scan the menus for this stuff.
Once again, I found what I was looking for at Le Crypto, Reims, whose chef Frédéric Dupont I can recommend as a specialist in pork chops, risotto and sweetbread.
Certainly, his golden-brown roasted French sweetbread calls for an elaborate search of the wine list. The discovery: Champagne Thiénot Vintage 2012. This wine presents the paradox of power and finesse in an exquisite manner.