Czechoslovakia's first coinage series required extensive trial striking before production standards were finalized, and the 5 haléřů denomination saw multiple experimental compositions tested in Prague during the early 1920s. This bronze alloy — leaner on zinc than many contemporary European issues — appears to have been evaluated against aluminum and iron alternatives before the final specification was settled.
Trial pieces from this program rarely escaped the mint in any official capacity.
Czechoslovakia's first coinage series required extensive trial striking before production standards were finalized, and the 5 haléřů denomination saw multiple experimental compositions tested in Prague during the early 1920s. This bronze alloy — leaner on zinc than many contemporary European issues — appears to have been evaluated against aluminum and iron alternatives before the final specification was settled.
Trial pieces from this program rarely escaped the mint in any official capacity.