Try and help you a bit if I can mate.
The first numbers are the wire guage 24 in your case
The second numbers are the number of turns of wire 900 in your case.
AFAIK the last couple of numbers relate to something like the type of lug on the coil.
Anyone can correct me on this.
But with my theory a 24-900 coil is a 24-900 coil and is interchangeable.
Hope that helps a bit.
Cheers,
