All insulators in this picture are Bullers made and marked, in all cases with the logo only. The large brown on the left is ink stamped under clear glaze As you can see, not all are the traditional Cordeaux shape. Again, please click on View Original for better detail. The 4 off whites in front are all marked with the Bullers logo, and on the location opposite the logo are marked FCMU, except for one which is marked 12666 in very small numerials. I do not know the significance of the 12666. Some are small letters, same as the 12666, others have larger letters. Other than the ink stamped piece on the left, the brown glazed pieces are all marked with the impressed logo [crown], or the logo marking is on the tops . Pieces with the brown glazed tops are crown marked, but due to the heavy glaze, these do not photograph well. You can more easily see the crown marking on the right hand brown. The off white in the background is logo marked on the top, but does not show any railroad markings |