In 2014, the '07 Mustang started showing in mulitpacks and 3 packs. It was also in the 2014 mainlines, and the casting had the same tampo scheme as the multipack and 3 pack casting. But, with the multipack and 3 pack casting, there was a type of variation found, and not many of these were found. The variation I am talking about, is the open window variation. The side windows were open, and were not closed, as with most of the '07 Mustang castings. It could have been found on the '07 Mustang in 9 packs, or 3 packs. The photo below, shows exactly what the variation looks like. The one in the photo is of one in a 3 pack. If your an '07 Mustang collector, this variation is a must have!