Look at this logo.  This is one of my favorite (mostly) dead logos.  In it’s useful life it was the logo for ČKD (Českomoravská Kolben-Daněk), one of the largest engineering companies in the former Czechoslovakia (and current Czech Republic).  What a perfect little geometric beauty.  Hell, they even incorporated the caron into the design.  What a beaut.

I originally came across this logo when I scanned this old Czech stamp.