i dont know much about eurorack either but the disc you asked about is a cv source and trigger called hd-rot…cant quite call it a “clock” in the sense that i think most users would because it is controlled mechanically: without a push from your hand it does nothing
the builder, gijs, is a great artist who has become one my favourite designers during the past couple of years
as you can see, i own many of his toys & tools (half of which are not pictured)
if you are curious pm me
or explore his site and/or email him with questions
he is always pleasant to chat with
