Here are some misc wire holders with interesting shapes. The first one is marked on the front FEDCO and SERVALL on the back. I have two and I'm pretty sure they used a retooled U-47 mold to make these. The two I have are the only ones I've ever seen. The next is a No Name made by Brady Electric Mfg. Co. They had a patent showing this wire holder only without the lag US 1,867,206. The next one just has a simple U on the front bottom. Not sure if this is Union Porcelain Company because it is embossed or an early Universal Clay Products marking. There trade mark was usually a recessed embossed U in a circle. The nexrt piece is not known though it is shaped similar to Superior Porcelain Company pieces. The glaze is so thick i couldn't even see anything with a bright flashlight shinning into it. The next piece is marked Circle M and on the back Pat. Pend. I thought this was Illinois Porcelain Company but not to sure because the marking in Elton Gish's book is embossed and this is recessed embossed. After that is an unmarked smaller version, The last three are all unmarked but have the same glaze colors. They are US made, where found, and the same type of porcelain. Would love to know who made these.