Sven Petersen 🙈🙉🙊 (เด็กอ้วน) on Twitter: "25 days after I have ordered it, my #SwissMicros #DM42 arrived. It is the most precise calculator and it is a remake of the HP-42. i
Hewlett Packard HP 6S Scientific Calculator with Sleeve Vintage Metallic Blue. 88698785416 | eBay