I bought a bent wood case machine this week-end and I think it is a 99 but I cannot find the list like I use to find that had the born on date and model number. The Ser number is AA704827 I found where a group was made in 1925 and that is it. I hope this is a 99 because I have one in storage with out a case and this bend wood is in very good shape. The machine not so good but it will be awhile before I get back to MO to check things out. Thanks for any information.