Texas Instruments TI-55-II LCD Slide Rule Calculator, Case, Manual & Box.  This has the added versatility of statistics and programming.  Dated 1981.  Comes with original box, Calculator Decision Making Sourcebook and protective carrying case.  Batteries are NOT included.

Weighs 1 pound 2 ounces unpackaged.

This needs batteries.  Outer box is worn/torn.  Being sold "AS IS."