Calculadora HP 20S HP20S NEW OLD STOCK Vintage HP-20S Scientific Calculator – Brand New in Blister – Rare HP DIRECT Edition .SINGAPUR 1987 Up for sale is an original Hewlett-Packard 20S scientific calculator, still sealed in its factory blister packaging – never opened, never used. This is a rare find from the legendary era of HP's engineering excellence. 🟢 This particular unit was distributed via HP DIRECT, Hewlett-Packard's direct sales channel in the U.S. during the 1990s. It even features the original HP DIRECT 1-800 number on the display – a nostalgic detail for collectors and tech history enthusiasts.