AIX 4.x ships with X11R5 and Motif 1.2.
On AIX 3.2 the base version has X11R4 and Motif 1.1 and the extended
version has X11R5 as AIXwindows 1.2.3. See question 1.500 for more
information about determining your revision.
AIXwindows version 1.2.0 (X11rte 1.2.0) is X11R4 with Motif 1.1
AIXwindows version 1.2.3 (X11rte 1.2.3) is X11R5 with Motif 1.1
'lslpp -h X11rte.motif1.2.obj' should tell you if you are
running Motif 1.2.