The following details about the development of the early Sharp electronic calculators is based on information kindly supplied by Sharp Corporation.
Thank you for calling by to check out this stunning Sharp Electronic Printing Calculator EL-1057S. The calculator is supplied in full working order with some life left in the twin colour ribbon but I know that you can easily obtain fresh ribbons from a famous internet auction site !!. The casing is showing very small signs of usage, but don't we all who where about in the seventies !!.