"CHAMBERLAIN & CO. CIN'TI. O." 
I am trying to find out some more information on a cast iron piece that I got from my grandpa.  It is a long handeled, three leg skillet/oven that is 12 inches across and not quite 3 inches deap  the lid is marked clearly on the top with "CHAMBERLAIN & CO. CIN'TI. O." and there is also a "No 1" on there in the center of the lid and on the underside of the lid there is a "1"  I am not having much luck finding out anything about chamberlain other that they have a patented teapot and made cast iron banks.  I was hoping to be able to find out an age and guess on value, although I have no intentions of selling, since it is a family piece.  I inherited many cast iron pieces from my grandpa, mostly Wagner and Griswold.  They are relatively easy to find information on, but this piece has me a bit stumped.  Any help or direction you are able to provide is greatly appreciated.  Thank you in advance!