bulgie 

Depends on which bike you're talking about. If you meanmerziac 's, then yes those are Merz brand.

Note how the front doesn't attach to the dropout, so it doesn't stiffen the lower curved part of the fork against acting as suspension on bumpy road. Connecting to the top of the steerer is structurally efficient.

F and R both attach with precision, custom-sized clamps that don't need any braze-on on the frame/fork. Total show-off move! But in a good way, I am a fan.
Each rack was made to fit a particular frame/fork, and is very unlikely to fit on any other.

Large diameter thinwall steel, very good stiffness-to-weight and strength-to-weight ratios. We all know that now, but back when Jim started doing those, no one else had anything similar. (Bruce Gordon racks came along later.)

Mark B