B1238 3K – A new collection/series featuring three features in one. Patek Philippe’s new series CUBITUS 5821 watch, Nautilus.

1️⃣ Movement: Features a fully automatic chain-up movement of the customized 9015/Cal.26-330 type. 2️⃣ Steel band: Customized ergonomic strap for 316L, with a new buckle design. 3️⃣ Case: The size of the case is 45 (excluding the clasp); it corresponds to the diagonal length of the case (i.e., the distance from 10 to 4). Since the case is roughly square-shaped, the width of the top and bottom edges is less than this value. Therefore, its visual appearance is comparable to that of the classic 5711 model. Following 5711, another classic-style watch model has been created.