Omega Speedmaster Professional 105.012-66 CB CaseA tale of two cases The reference 105. 012 was the first Speedmaster to feature the asymmetrical case. In fact, this reference was available in two different cases, one manufactured by Huguenin Freres (HF) and the other by Centrale Boites (CB). Both cases featured single step case backs but are differentiated by a small line between the polishing planes on the undersides of the lugs on the CB cases. The watch we are offering is a CB cased example in