ADSP-BF561SBB600 - Die Revision vs Package Marking

Howdy,

We have recently received from our CM boards built with a BF561SBB600 part which are all marked with 0.5.  However, through programming, or direct register reads, we have found some of the die to be revision 0.3. I have also noticed that there is no '#' in front of the date code for this batch.  My concern is that these parts could be black-topped / remarked and don't want them to deploy if so.  Attached is a picture of the markings - Regards, DChapman