This is an extension of an answer I posted years ago to the Retrocomputing question:
How did Apple fail to tap the business and scientific markets?
Most (all?) IBM PC systems required parity memory, but most early Macintosh models did not. The Macintosh IIci was the first to finally meet this specification.
After further research on the matter, I have found that Apple used to produce a document called the "Memory Guide" for early Macintosh products, updated every two months. The November 2000 version of the guide can be found here:
http://akarchive.digidesign.com/support/docs/memguide.pdf
On page 14 it says:
There are two logic boards for the Macintosh IIci, one with and onewithout parity. You can identify the Parity logic board by the largeparity IC installed to the left of the SIMM slots.If you have a parity logic board (identified by the presence of theparity chip at the location noted), be sure to install parity SIMMsfor proper operation.
However the actual motherboard / logic board part numbers are not listed.
