Based on this nomenclature system:
http://www.cloudynights.com/ubbthrea.../o/all/fpart/1
with my 132mm refractor I've seen the A, B and C/D (the last two appearing as one object) when the seeing is good and Plato near the terminator.
At Full Moon I've seen the A craterlet a couple of times as a white dot, but none of the others.