“I’ll be sure to show them my new stationery that unequivocally pronounces Maxine Dellacorte,” Kristen Wiig declares on the Emmy-nominated, 1969-set dramedy Palm Royale.

Mayfair shop Mount Street Printers has focused on bespoke stationery sets since its founding in 1981, making it an ideal place to go for thoughtful thank you notes. Envelopes are lined with myriad ...