Hi when you say SDK version this could mean several things:
If you are talking about the compliance level of the card, it is specifically Java Card 3.0.5 and Global Platform 2.3 and this is likely not to change I would imagine (though certain features and fixes may change over time).
If you mean which OS level, patch, modules and OS features available, etc most of it you can get from the GET DATA (IDENTIFY) command which you can find details on in the JCOP 4.5 User Guidance and Admin manual under NDA.
If you mean which packages / libraries are loaded in the ISD, this can be read using the GlobalPlatform GET STATUS command (no NDA needed for this).