A method for production of a horology assembly of two components, comprising (i) supplying a first component (2) being a spring, and comprising at least one element made of elastic material provided with a tongue (20); supplying a second component (3) provided with at least one cut-out or opening (31, 32); permanently assembling the two components. The two components cooperate by means of an obstacle such as to create the assembly, and in particular the tongue is accommodated in the at least one cut-out or opening (31, 32).