no these are all not much rare coins ... but the coins condition is very poor ,
i think these are coins are kept years together in a box , in that condition one coin with other coin friction and moisturizing cause this damage and also it is cleaned with some soap or salt rubbed i think ....
ya.. it was kept together in a box since 60 years, i think. there are 6-7 more coins dated 1944,1946,1951 etc. all copper coins, dark brown/black in color(but inscriptions visible.), out of those cleaned 2 copper coins with soap( sorry i didn knw we shouldn do it
) .
thanks,