President - Vintage Sinclair

The president wss released in February 1978 and one of the last calculators Sinclair produced. It was also the largest and described as "The President is primarily intended for on-desk use."
They were also the only models not manufactured in England because of the cheaper manufacturing costs in Hong Kong.
However, the silver paint finish was poor and easily rubbed off (see right).

Price : 17.95
Display : 8 digit VDC (Vacuum Fluoresent Display)
Power : 2 X AA (3V)
Functions : +, *, -, /, %, square root, square and Memory
Integrated circuit: National Semiconductor MM57134ENW/M.

President Scientific

The President Scientific was almost identical to the President, but had additional log and trig functions.