It has been pointed out by several workers that the class 1 coupling coefficient form of the SEM expansion for the current density on a scattering object tends to be numerically unstable in the early time, before the leading edge of the incident field clears the object. The class 1 form is computationally more attractive than the more reliable class 2 form; it is also the form mandated in some applications as, for example, in the SEM equivalent circuit synthesis. This paper presents a numerical evidence that the class 1 coupling coefficient form yields good results provided the time origin of the problem is placed at the observation point. It is concluded that the assessment of the practical utility of the class 1 coupling coefficient form prevailing in the literature is, perhaps, too pessimistic.