HP-21S

Little Giant 558581 W8G05S9-21S Submersible Deep Well Pump

HP 21S Stat/Math Calculator from 1989

solvers

Hewlett Packard security cradle to HP 21 22 25 25C 27 29C Calculator 1970 USA - Vintage Man Stuff

HP 21S Stat/Math Calculator from 1989

Hp-21S Owner's Manual For Hewlett-Packard Stat/Math Calculator

HP Calculator Models

HEWLETT PACKARD HP 21S Stat/Math Electronic Vintage Statistics Calculator +Pouch $53.00 - PicClick

HP calculators - Wikipedia

, Calculator has cosmetic wear and visible scratches. Tested - works great., Requires 3 LRR batteries - batteries not included., I ship next

Hewlett Packard HP 20S Scientific Calculator Slip Case Vintage 1987