How about a copy of the book "The Crown: The Official Companion, Volume 1: Elizabeth II, Winston Churchill, and the Making of a Young Queen (1947-1955)." Another idea is a subscription to a streaming service that features historical dramas like The Crown, or a season pass to historical sites related to British royalty. Another option could be a personalized mug with a quote or image related to The Crown, or a piece of jewelry inspired by the show, such as a tiara or brooch.
Or you can get her/him a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.