A fascinating and exceptionally rare École d'Horlogerie de Genève pocket watch, dating to 1964 and coming directly from its original owner, the watchmaker who created and preserved it throughout his life. Produced as part of the demanding curriculum of the Geneva Watchmaking School, pieces of this nature were intended to demonstrate the student's mastery of traditional watchmaking techniques and are seldom encountered on the market today. Their historical importance lies not only in their rarity but also in the fact that they represent the work of future professional watchmakers at the very beginning of their careers. The present example is housed in an elegant yellow gold case and is believed to be powered by a Patek Philippe movement bearing the prestigious Geneva Seal, a remarkable feature that further enhances the significance of the watch. The quality of execution throughout reflects the exceptionally high standards historically associated with the École d'Horlogerie de Genève and the close relationship between the institution and Geneva's leading watch manufactures. Most importantly, the watch comes directly from the original owner and maker, an increasingly rare provenance that provides a unique and tangible link to its creation. Watches of this type were generally produced in extremely small numbers and very few have survived accompanied by such direct historical continuity. Combining exceptional rarity, traditional Geneva watchmaking heritage, a probable Patek Philippe Geneva Seal movement, and impeccable provenance from the watchmaker who created it, this is a remarkable collector's piece and a rare opportunity to acquire an authentic witness to Geneva's rich horological history.