Hewlett Packard HP42S RPN Scientific Calculator With Slip Case.

HEWLETT PACKARD HP-42S RPN Scientific Calculator Vintage Black Manual Case

VINTAGE HP-42S Programmable Calculator

Vintage Hewlett-Packard HP 15C Scientific Calculator With Case TESTED & WORKING

HP-42S Scientific w/(3) new Energizer batteries. Tested and working.

Hewlett Packard HP 32S RPN Scientific Calculator Vintage 1987 TESTED w/ Case

Hewlett Packard HP 32S RPN Scientific Calculator Vintage 1987 & Case | TESTED

HP-28S Hewlett-Packard Advanced Scientific Calculator Working And Tested