The calibre 30T2 was designed to be suitable to exhaustive regulation for the Chronometer competitions held annually at the Geneva and Neuchatel Observatories, and typical of their kind, the finish is not necessarily decorative. Rather, each part is elaborately brushed or smoothed, teeth and spokes beveled and burnished, often to extreme thinness and delicacy. The present watch features a very rare and unusual size. When most model bearing calibre 30T2 were produced with 35 mm. diameter, the present watch offers any knowledgable omega collector the opportunits to acquire a 38 mm. diameter model.