In my efforts to better capture the details around different Apple II models, board revisions, manufacture dates, serial number information, etc., I've run into the problem of inconsistent or sometimes confusing data on the various history sites or articles online. I think collectively we've got an accurate picture, but it's poorly documented and sometimes missing pieces. Through sampling examples of machine information from volunteers, the hope is that we can build a a more accurate representation of how models, serial numbers, board revisions and manufacture dates relate.