The vast majority of Jazz's Q400 are next gen. There are 10 (Fin 489-498) that are the previous generation of Q400 with smaller overhead bins. From memory, those that have SR in their registration (eg: G-FSRY) were previously flowned by Sky Regional between YUL-YTZ and were acquired from Lynx Aviation.Those that have JZ (Fin 494-498 eg: C-GJZN) are former US Airways as mentioned in the previous post