I was blessed (?) with a free tube of (obsolete) LTP-305 dot-matrix display chips this summer. After WAY too much work, I have turned them into visible time display for my old GPSDO. Rehoused the GPSDO within a case I designed, and put a bit of smoked acrylic over the digits on the front. I will at some point change one of the display lines to be local time, but I am really sick of working on this project!