This Ulysse Nardin complicated repeating perpetual calendar clock watch is highly unusual for a number of reasons. The first is its mechanism and the two train winding has an unusual set up and operates in the following manner. The striking train is wound by pulling out the crown, locking the going train, once the crown is pressed down, the movement is wound in the usual manner while keeping the striking train locked.

There are pages of correspondence between Esmond Bradley Martin and the Ulysse Nardin manufacturer, giving details of Mr Martin's requests regarding the case design, stating the following: "case exactly like the Patek Philippe on picture enclosed with sharp edges and some brush surfaces." Further noted are the complications to be included and that the expected delivery is 1 to 2 years.

In addition, there are further photocopies of a letter dated 12th January 1961 from Ulysse Nardin discussing the construction progress of the watch and confirmation on certain design recommendations regarding its finishing. There are also details of the enormous purchase price at the time of 10,640 Swiss Francs. To put this in comparison, a Patek Philippe reference 2499 retailed for just a few thousand Swiss Franc at the time.

Furthermore, the movement is running and all the complicated functions are working correctly. The minute repeating chimes with a nice tone and clarity. The case is also exceptionally crisp, meeting Mr Martin's requests.