Here's a small one for being a multipart (2-part), it's just 120 mm in height (ca 5 inches). This piece was a part of the finds in the abandoned power-house in 1994, and it's mint condition. Brown types of this insulator are quite common, but like it's larger "brothers", the white ones are rare. I don't know about the manufacturer; it has no embossings whatsoever...

[IFONA M ???]