There were lots of variations to the circuit on this model. Paul is not far off the mark....the manufacturers tended to use what was available so there are variations in valve types and components used. some sets have a mixture of octal and B8A some have B8A and B7G. Others have all B8A or all octal...there are probably some that have octal and B7G. Some have chassis punched for octal but have conversion plates fitted in the original holes to take different size valves....the list goes on.
You will probably have to obtain several circuits from different sources and kind members of this forum to provide more info (I only have the trader sheet).
That said though I still think these are great little sets.
Rich