377101 - 119 12 F, 48 S / 66 S / 56 S / 12 F, 48 S
377120 - 139 12 F, 56 S / 70 S / 60 S / 12 F, 56 S
377140 - 164 12 F, 48 S / 69 S / 57 S / 12 F, 48 S
377201 - 215 12 F, 48 S / 69 S / 57 S / 12 F, 48 S
377301 - 328 12 F, 48 S / n/a / 52 S / 60 S
377401 - 475 10 F, 48 S / 69 S / 56 S / 10 F, 48 S
These are the layouts as delivered, but I believe a few have since been altered. It' s easy enough to work out where the 2+3 seating is from these numbers.