New York, Auktion, 09.12.2025
 A Pery diamond wristwatch featuring an oval, portrait-cut diamond crystal (estimate: $10,000-15,000) and a set of Hemmerle’s mammoth ivory-and-diamond pendant earclips (estimate: $30,000-50,000) are paired with garments from Gabriela Hearst’s Spring 2026 collection.
Wien, Auktion, 23.05.2024 - 28.05.2024
 House of Habsburg Diamond Brooch with untreated Rubies, total c. 2 ct Provenance Archduchess Marie Valerie of Austria and descendants, work around 1880, design and elaboration attributed to Imperial Court Purveyor, A. E. Köchert, under master craftsman Wilhelm F. Haarstrick, original case estimate €10,000–15,000
Paris, Messe, 06.09.2019 - 09.09.2019
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