[Milos Gazdic]

Hello Peter,
Unfortunately I don't think there is any connection of between these two given by any rule or order. Simply the available power egg would be attached to available fuselage & sometimes power egg would be changed during the life of the airframe which would bring even further confusion to the things.
I would love to be proven wrong since there were few times when the front of the aircraft it shown late in the war clearly showing it's power egg number but not showing the W.Nr. and such chart or database would for sure help in solving quite a few "mysteries".
Best,
Milos