How to check which firmware version I have?
There are several firmware partitions, some flashed to both a and b slot block device and some flashed to both itself and a backup location block device (those having appended 'bak' to name).
Please check META-INF/com/google/android/updater-script in the ZIP for what is being flashed where.
As about telling which one is currently flashed, many firmware partitions one cannot explicitely check, I suppose.
Perhaps the 'Baseband version' might be only reference, mine currently reads:
(see also tissot telegram)
(do not ask what these numbers mean )