Prazské kamenné is credited to Stanislav Maršo, Grafotechna, 1960. [Reichardt 2011] Canada Type suggests it’s a reworking of Georg Trump’s Signum (Weber, 1955). Differences include ‘a’ w/ horizontal belly top, ‘g’ w/ two more evenly weighted counters, lower dots on ‘i’/‘j’, ‘j’ w/o hook, ‘Q’ w/ non-detached diagonal bar, ‘S’ w/ more angular spine, and a forwarding-leaning ampersand. The name translates to “Prague stone” and might be related to Steinschrift, an old German term for sans serifs. Came in a single obycejné (regular) style.
Trump Gothic (Canada Type, 2005) is “a reconception of ideas” from both Signum and Prazské kamenné. The sample uses its Medium weight with the alternate ‘a’.