This picture is of wire holders and related made by Ceramic Specialities Co. Ohio. For years I thought these pointy wire holders were made by Findlay Porcelain Co or some other But was overjoyed when a picture was posted from the ceramics museum in ohio by Colin Jung when he was at the 2022 National and site seeing. Now I knew who the manufacturer was and could attibute these pieces to a name. On the top row the first 6 pieces are all unmarked but share the same feature with a bolt or screw holding the lag to the porcelain. The seventh piece is marked Pat. Pend/ 3 4 05 which refers to patent US2,228,196 in Jan 4, 1941 for a unique way of attaching the lag screw. Next piece is marked Pat Pend, the next two are marked Pat. Pend /S-410, Last one is marked Pat. Pend/ 412. On the bottom row are other Ceramic Specialities products. A cleat with C in a circle/334, Small spool with C in circle unreadable cat number, Large spool C in a circle/ 355, Split knob 5 1/2 Nailin/ C in a circle, Knob Nailin 5 1/2, C in a circle, Last is a RACO Dead-End, C in a circle on bottom. Thomas Insulator company also made these but there marking is a T in a circle on the bottom. Really neat pieces.