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.
Haworthia limifolia var. limifolia developing fruit
Bonus – check out this colour it’s gotten in full sun this summer.
Will be interesting to see what I can get to grow from these seeds.
All Andrew's Plants 
Congrats! Hopefully they're viable. It will be fun to see if they sprout.