based on my gravel wheelset list:
cadex maxgr
csixx gravel wide 45 or 65
Newmen Streem G-62G
Reserve 48/53 GR
Specialized Terra Aero CLX
Strada gravel Aero Plus 2
VoiceVelo GA450

i think some lightbicycle rims or sth similar has those "holes" under the rim bead. maybe it was just duke