Apparently Haworthia limifolia var. limifolia can self polinate, but rarely. This plant has literally had flowers on it all summer. It’s currently got three bloom stalks going at once and has produced hundreds of flowers (likely near or over 100 per stalk total, two or three per day per stalk – the third stalk only started a few weeks ago though), and I have a single fruit developing to show for it.
Will be interesting to see what I can get to grow from these seeds.