Isaha yo ku kuboko Janus ni isaha yo ku kuboko ifite impande ebyiri z'isura n'umukandara ushobora guhindurwa. Impande zombi zishobora gukoreshwa, bityo uwambaye ashobora guhindukiza igikoresho, agahindura uruhande rw'isura kandi agahindura imikandara kugira ngo bihuze n'imyambaro n'ibikorwa bya buri munsi. Uruhande rumwe rw'isura rukoreshwa n'imashini ikora yonyine (automatic movement) naho urundi rugakoreshwa n'imashini ya quartz, ibyo bikaba bituma umuntu ashobora gusoma amasaha y'uturere tubiri tw'igihe. Igikoresho n'amaboko manini yacyo bikozwe mu cyuma kidafata ingese (stainless steel) kandi binyuzwa mu nzira ndende yo gukarabishwa neza. Uburyo bwo gufatisha buhishwe mu maboko y'igikoresho bufata umukandara nta bindi bice byigenda byiyongereyeho. Imikandara ikozwe mu ruhu nyakuri.

Izina ry'umushinga : Janus, Izina ryabashushanya : WIlliam Volcoff, Izina ry'abakiriya : WOLKOV.