Reference 605 represents the Patek Philippe pocket incarnation of the World Time (Heures Universelles) mechanism invented by Louis Cottier. Between 1930 and 1964, Cottier delivered to Patek Philippe 95 modified 17-170 movements (considered one of the best time only movements of its time), most of them employed in ref. 605, rendering this an astoundingly rare model with a total output below 100 pieces.

The present example impresses with its incredible condition. Obviously hardly ever used, the timepiece appears to be in superb condition in all of its parts, to the point that it can be considered a “scholarly” piece which allows the beholder to admire the original proportions of the case and details of the dial in absolutely unmarred state. The satin finish to the back is strong, the hallmark to the bow crisp and a layer of oxidation is present. The city ring moves smoothly and correctly and satisfyingly snaps into place, indicating no buildup of debris underneath the bezel.

A final layer of appeal is given to the watch by its "short signature". Patek Philippe changed their signature from "Patek Philippe & co." to "Patek Philippe" in 1948. The Extract confirms that the watch was manufactured in 1946 ( meaning the movement was made in 1946) and sold in October 1948. It is more than an educated guess that the dial was mounted on the watch while completing it in 1948, making this one of the very first “Short Signature” Patek Phillippe watches.