Country: Czechoslovakia (Socialist Republic of Czechoslovakia)
Nominal: 10 hellers
Period of chasing: 1974 -1990
Years of chasing of these coins: 1974-1981
Fully identical, the difference is only in the year of chasing
Material: aluminium
Diameter: 18.2 mm
Thickness: 1.6 mm
Weight: 0.9 g
Edge: smooth