Up for sale is an exceptional pair of handheld calculators from the mid-1970s, both made by Hewlett‑Packard. The first is the HP-21 (introduced in 1975) and the second is its business-oriented counterpart, the HP-22 (introduced soon after). Key historical/contextual information: * The HP-21 was part of HP’s “Woodstock” series of handhelds and was introduced in 1975 as a smaller, less expensive follow‐up to the HP-35. * The HP-22 was also introduced in 1975 (August) and was designed with business/financial functions in mind rather than purely scientific ones. * Both machines use LED displays and (in HP’s typical style of the era) employ RPN (Reverse Polish Notation) entry logic (particularly in the HP-21) and a four-level stack. * Approximate original U.S. retail pricing: HP-21 listed at about US $125 in 1975. The HP-22 at about US $165 in 1975. * These calculators have become sought after by collectors of vintage Hewlett-Packard handhelds and early electronic calculators. The model HP-21 is described on a collector’s site as “still in great demand and fetches a very good price if you can get one.” Condition & inclusion details: * The lot includes both units: HP-21 and HP-22. * Both appear in very good aesthetic condition, with only minimal signs of wear consistent with age and use. * They are sold as is, without original accessories or protective cases. * They have not been tested for functionality, as no suitable power supplies or chargers were available. * Inside each unit the original batteries/accumulator packs appear to be still present and sealed/capsulated in their plastic housings as from manufacture, and the seller has not attempted to open or replace them so as to avoid risk of damage. * Photographs included in the listing show the units as they are; any reflections or screen glare seen in the images are due to lighting and do not indicate damage to the displays. * You will receive exactly what is shown in the pictures; no additional parts or accessories are included. Why this is a desirable lot: * Having both the “scientific” HP-21 and the “business/finance” HP-22 together offers a rare pairing from the same era and series of HP handheld calculators. * For the collector of vintage HP calculators these models represent an important transitional period (mid-70s) when HP shifted from the first generation of handhelds into more compact and mid-market models. * Even in untested condition, units in very good cosmetic shape like these can form the basis of restoration projects or display pieces. * As both units come without accessories, the price reflects that; however, the core units themselves are intact and presentable—offering excellent potential value. Shipping & additional notes: * The calculators will be carefully packaged for safe transport, given their vintage nature and the potential for fragile internal componente. * Please review the detailed photographs. * No returns offered due to the item’s age, condition, and untested status—please bid accordingly. Thank you for viewing this listing. This is a rare opportunity to acquire a matched pair of Hewlett-Packard calculators from the mid-1970s—both with strong aesthetic condition and full collectibility potential. Good luck bidding!