I have two Bismarcks, both excellent shavers. The one in Ivory I bought from a fellow SRP member several years ago and was told they thought it was a pre-Dovo. It originally had Ivory colored celluloid scales with either 'Bismark' or 'Solingen' (I can't remember which) engraved in the scales. I believe the Yellowed scaled razor is newer made after Dovo bought/took over Bismarck.