Thinking of a David Bowie song. Miss him. This lot is more standard tubes where all the companies pretty much had the sames styles but with their marks. The first 4 are marked with a incused diamond for Diamond Porcelain Co. These diamonds are slightly different from the Diamond Line marked pieces from Akron. The next one is marked wuith a B (possibly Barber Electric Co.), after that is marked D.P.Co. for Davison Porcelain Co., The next 4 are marked E and E.P.Co. for Electrical Porcelain Co. The last two are marked with an O for Ohio Porcelain Co.