Omega, Cal. 26.5SOBT1 powered, rare matte white sector dial, stainless steel, cushion case, circa early 1930s.
The case diameter is 31mm, which is a small size, but it has the unique presence because of the cushion case, and the sector dial without numbers, which is very precious and also called "Tokyo Metropolitan", is a gem that shows the aspect of the times. The Cal.26.5SOBT1 is equipped with a Côtes de Genève finish, which is not seen after the T2 of later years.