Roasting Rack #1225

Hi,
I am new to this forum. I joined because I have been purchasing some roasting pans on ebay for family members that matched my mother-in-law's old set and would like to get an answer to a question.

I found a Wear Ever roasting rack with sides #1225 in a local thrift store. I was hoping to use it in pan #918 but it does not fit when putting on the 818 lid. I can not seem to find any information about the roasting rack. What set does it fit? Is there a roasting pan with the same number?
Thanks,
Howard Foote

is it possible to fit a 156 st. rack on a 155?
And how can it be done?
I m looking for quick racks and I start thinking that you have to be lucky to find a 145/146/gtv/155 with the proper rack.