Poland - 10 Zlotych Nicolaus Copernicus 1967

You gotta love Copernicus, and coming from Poland you can expect some commemoratives. This is a second issue and reduced in size (what? copper-nickel value went up) from the original of 1959 at 31 mm vs. this one of 1967 at 28mm. Thereafter the 10 Zl went back to 31 mm, funny. They were struck on 5 different years from 1959 to 1969 with this one of 1967 with the lowest mintage [2.128M].