They look just like the first pearl earrings I ever bought, in the 80s in San Francisco They were freshwater though I had no idea about such things at the time. The logo could be for the finding.
Hard to say...they don't look like Akoya and seem like South Sea keshi too, but most likely freshwaters like @KarinK mentioned.
The setting seems very traditional, I don't see anything special in it so i don't understand why even "brand" it.