It was clear then that these oversized (because these chunky cases actually fit the term oversized) cases had no real future, at least not for the civil consumer. A more practical and more durable solution was needed and this meant there was no other way but to integrate all waterproofing into the watch's case. François Borgel, a Genevan master case maker had filed two patents, in 1891 and 1903, respectively, for two slightly different watch cases that had threaded parts. A major upside of this design was that it omitted the external case. Instead it would enable the "normal" case to achieve same levels of isolation. Speaking about the more advanced 1903 patent, it comprised a threaded ring that would go around the movement and bezel, and the case back would be screwed onto the outer, threaded surface of this ring. This resulted in a superior seal, without having to use a chunky external cover.
The Z-33 took a modern approach to the X-33 in regard to design, but kept much of what people liked about the original. A new black LCD screen used red numerals, and the overall functionality and dial design was very elegant. Omega decided to revive the classic Flightmaster case for the Z-33, which proved an unwise decision in hindsight. Omega admitted that it was not the best way to bring back the Flightmaster case because the resulting Z-33 was much too thick and controversially designed.