The present model, named Horological Machine No. 5, is a complex timepiece that has a daring appearance. The time display of the watch consists of bi-directional jumping hours and trailing minutes with indications inversed. The movement of the Horological Machine No. 5 is protected in an internal waterproof compartment, with two exhaust ports to drain water away from the space between the exterior case and internal compartment.

The revolutionary, futuristic case design of the Horological Machine No. 5 was inspired by two epoch-defining items from the 1970s - the plucky Amida Digitrend watch and high-performance supercars. The reference HM5 RT was made in a limited number of 66 pieces of which production concluded in 2014. By all means a grand attention-grabber, the present lot is an eclectic timepiece for an eclectic watch collector.