Just an observation here to add to the confusion. Note for example the 1005 824 071 number is on the nose housing. Alfa and Bosch have typically used the number on the field coil housing as the starter assembly number. The Series 3 Spider starter I have here shows 1 005 231 071 on the nose housing but the complete starter is listed in the Alfa parts book as 0 001 108 024, the same number that's on the coil housing. It would seem that the 1005 824 071 is the part number for the nose housing only.
To further compound the confusion, a geared starter I believe came from an 86-89 car has the 1005 821 071 number on the nose casting, but an 0 001 108 011 number (!) on the field (motor) housing. The 90-94 starter I bought from APE matches what you indicate, ie. 0 001 108 081 on the field (motor) housing, and 1005 821 419 on the nose casting.
Jim, any chance you can see if 0 001 108 011 corresponds to any Alfa part number from somewhere around that era? It doesn't show up on PartBob (nor do 0 001 108 081 and SR484X) , but 0 001 108 024 shows up as being applicable to pretty much every Nord Alfa from 72-88(?).
PartBob.com the Online Store of Robert Bosch
BTW, when doing part searches on PartBob, add one leading zero and omit any spaces if you don't want thousands of results.
I don't know if this helps or confuses, but this is from the horses' mouth.
Mike, the number we're referring to is stamped on the motor housing roughly
under the SR484X sticker on your starter. BTW, I like the "Do not strike with hammer" sticker. Good advice. Every fool knows you hit the solenoid with a hammer, not the motor itself! :hammer:
Paul