Alas I have no clue what they are. The bike was originally built by Seabass, but they didn’t supply the rims. My guess is Chinese (LB?)
I’ll try for a better pic when I’m home.
I gather most of the cool kids are using SwissStop Black Prince in the absence of specific advice from their rim maker. LB have their own pads but also approve SwissStop
Consult your rim manufacturer, they have their own favourites.