hello guys first please forgive me becouse of my bad english

is there any one who have any information about vintage calculators?
i come across to an " sperry remington 1218 " calculator wich i find out that from internet that is built in 1973
and and before i get to buy this dear i want to see a picture of the mainboard of it and i want to see if it has any gold chip on it
thanks for your time