Haworthia modesta is found around Potberg en Kathoek south of Swellendam in coastal limestone. Although regarded as Haworthia variegata var. modesta by some authors, the relationship maybe unstable and subject to change.
Haworthia modesta - Potberg
It is a small proliferous species with some variegation and translucence of the leaves.
The following photographs in habitat by Gerhard Marx:
Potberg habitat
Some plants are available on Plant Auction from time to time.