This is a CD 145 HG Co Petticoat beehive that I pulled off of the Pekin to Streetor, IL line back in the early 1980's. It is an enclosed bubble that runs about 2.25" by 1". The bubble causes the glass to to press against the inner skirt. From that same line I also pulled a CD 145 HG Co with 2 large rocks (fire brick chunks). This was well after the line was well picked over by previous collectors in the 70's. Thanks, Ed Peters