Victor 1210-3A - Manual (Page 10)

RESET RESET
RESET:
Electromagnetic interference or electrostatic discharge may cause
the display to malfunction or the contents of the memory to be
lost or altered. Should this occur, use the tip of a ball point pen
(or similar sharp object) to press the [RESET] button on the bottom
of the calculator. After resetting, be sure to set the tax rate, time
and date again.