This is an excellent example of a first generation Patek Philippe 2526. The 2526 is known as the first automatic watch Patek Philippe ever made. Aside from the 12-600 AT 30 jewel automatic movement, this watch has a first generation porcelain dial. The dial is all original and in pristine condition with no chips, cracks nor hairlines. The case of this piece is super strong with the hallmarks clearly visible. This watches comes with its original 18kt Yellow Gold Patek buckle. This is a wonderful and iconic watch. A great piece of history.