KP aka KoPro aka Kovozavody Prostejov (literally, "Metal mills of Prostejov") - The staple diet. The little boxes of KP were cheap, instantly recognizable, and available in nearly every toy and hobby shop. They epitomized communist-era thrift: gorgeous box art printed on paper so cheap it almost crumbled, fascinating airplane subjects that swelled with national pride. Early KP kits such as their Letov 328 had pilot figures, which I found particularly valuable. The later models such as the fetching Avia B-35 had more detail but disappointingly empty cockpits. In fact their first kit, the L-29 Delfin, was arguably the most crude as well as the most beautiful. I lusted after it but, for some reason, it was scarce.