For your consideration, here is a Texas Instruments TI-30X IIS 2 Line Solar  Calculator, with cover, no. K-0404E, made in China.  I have tested it some.  I did not try all of the functions.  The calculator has some light wear on it.  There is a name written very faintly on the back of the calculator.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (291.279x-.9hc)