20 Haléřů Trial Strike

Czechoslovakia's postwar monetary committee spent much of 1950 testing aluminium-magnesium alloys for low-denomination coinage as the state pushed toward cheaper, centrally controlled production following the 1948 communist takeover. Trial strikes from this period were produced in limited quantities for internal evaluation and rarely escaped the mint's administrative channels — most were destroyed or archived, making survivors genuinely uncommon outside specialist collections.