Believe it or not there are Web sites that sell antique telephones and parts. For about $400 you can own a restored version of one.
The nickel plating is in excellent condition. The black paint does not look like "Japan Black" which would be made from a very thick asphaltium type paint.
The electronic diaphram beneath where the cone sits was damaged and as a result it was removed. The cone is made from micarta. Micarta was developed by George Westinghouse at least as early as 1910 using phenolic resins invented by Leo Baekeland. These resins were used to impregnate paper and cotton fabric which were cured under pressure and high temperature to produce laminates.
Has a patent date of 1901 but was probably made around the year 1914. Patents can last 20 years and the cone is made from micarta.
Kellog Telephone Transmitter, Circa 1914
A collection of images from a an antique telephone transmitter from the turn of the 20th century. Not a very useful item except for possibly the screws on it. Makes for an interesting paper weight.
The flash from the camera makes the nickel plating look a little dull. You can zoom in on the images if you mouse over them. During autoplay zoom is disabled. Shrinking the browser window will shrink its contents possibly making it easier to view the gallery.
Valued in the range of $5 - $10.