Outside its principal collections, Jacob & Co has developed a series of timepieces that explore alternative approaches to time display, functionality, and mechanical architecture. These watches are not grouped under a single unified line, yet they represent significant milestones in the brand’s evolution, introducing concepts that challenge traditional watchmaking norms. From vertical time indications to multi-time zone systems and extended power reserve mechanisms, each piece reflects a distinct technical direction.

Models such as the Epic SF24 introduce a split-flap world time display inspired by mechanical airport boards, while the Five Time Zone series offers simultaneous tracking across multiple regions within a single dial layout. The Caligula redefines time indication through a vertical rolling system, departing entirely from conventional hands, and the Quenttin Tourbillon integrates an extended power reserve system capable of operating over an extended duration. Gem-set tourbillon creations within this segment further expand the visual and structural possibilities of the movement, combining mechanical precision with gemstone craftsmanship. Together, these watches form a category defined not by uniformity, but by innovation and technical diversity.