HP-28C/S

New Calc Friday! HP 28C, the first calculator capable of symbolic operations. : r/calculators

HP-28C/S

Hewlett-Packard HP-28S Handheld Electronic Calculator

NOS/NIP Hewlett-Packard HP-28C from 1987! : r/calculators

HP 28 Tri-color Original Ink Cartridge — dbm Computers

NOS/NIP Hewlett-Packard HP-28C from 1987! : r/calculators

Lot of 2 Vintage Calculators Ti 58C, case and Master, HP 28C for parts/repair

1 kilosubscriber celebration with the mighty hp 28S

HP 28S Scientific Calculator for sale online

HP 28S Scientific Calculator for sale online

HP 28S HP 28 S Advance Scientific Calculatrice Calculatrice *85 EUR 79,00 - PicClick FR

HP Hewlett Packard 28s Advanced Scientific Calculator for sale online