Corally used clips to mount their older wheels. So maybe Corally?Phin wrote: #5 looks to be a diff hub that doesn't use screws to mount the wheel.
I still think this might be a spur holder. The 5-to-3 mm axle hole screams "layshaft". Possibly for proprietary spurs?#12 is kind of like #11 but it fits a 5mm axle and has a 3mm hole for the axle thread.
#17 - A&L Lethal Weapon diff parts? Or extenders that fit over #16?
#18 could also be for body posts.