Chess sets created for particular events.
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Seville set for the Kasparov - Karpov 1987 WC comes to my mind. More info at https://www.chess.com/forum/view/chess-equipment/spanish-chess-sets-seville-87
Since 2016(?), US-based tournaments have been using the DGT-enabled Camaratta design that is a House of Staunton exclusive. They’re used this luxury set in the Sinquefield Cup, Chess960, Rapid+Blitz and the US Chess Championship events held at St Louis Chess Club in Missouri.
https://www.houseofstaunton.com/the-2023-sinquefield-cup-official-chess-pieces-dgt-enabled.html?qty=1
Looking at the new chess set used for the 2024 Candidates Tournament in Toronto, and mindful of the special editions created for the Dubrovnik Chess Olympiad, I wondered on which occasions sets were created for the occasion. Is there a list? I imagine in most cases already existing sets were used, but it would be interesting to see the particularities.