dsio
··Ash @ ΩF
Unlike many of the other Japanese Omegas, the 166.155 definitely hasn't propagated out of its home market much at all, with very little information on this reference existing outside of Japanese websites. The Omega vintage database carries no entry for the 166.155, and examples on the usual sites are few and far between.
Even more surprisingly, until I posted a silver dial example in the Omegaforums recommended vintage watches thread, there had been no mention ever of this reference in the history of the forum. [..]
Visit Hunting UFO’s in Japan, the Rare 38mm De Ville 166.155 to read the full article.