There should be a tag inside the door. Newer models just have a stick-on tag with the info on it, the older ones have a tag riveted in place near the bottom, just under the door. I've looked for, and missed seeing, that tag.
I'll do a little research tomorrow, if nobody else has come up with an answer before then.
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.