So I recently realize that I don't need a numpad but rather a desk calculator with mechanical switches & keycaps. : r/MechanicalKeyboards
This Retro Mechanical Calculator Has Gorgeous 3D-Printed Guts
Mechanical Switch Calculator,Handheld for Daily and Basic Office,10 Digit Large LCD Display (Pink): Amazon.co.uk: Stationery & Office Supplies
Kaufmann's Posographe: An Amazing Exposure Calculator from the 1920s | PetaPixel
Mechanical calculators: computing without electricity - LOW-TECH MAGAZINE
Building a Mechanical Switch CALCULATOR! - TENTAKU DIY Kit - YouTube
Mechanical calculators: computing without electricity - LOW-TECH MAGAZINE
IC] The first custom mechanical graphing calculator, the KeyI-84! : r/mechmarket
It finally came in. Tentaku Mechanical Calculator! : r/MechanicalKeyboards
triumphator mechanical calculator – Vintage Type Shop
Build a Retro Calculator
Tentaku Mechanical Calculator Case by RyanGuy | Download free STL model | Printables.com
Soldering the Keyboard Matrix | DIY Desktop Calculator with CircuitPython | Adafruit Learning System
Ducky Pocket - Have fun wherever you go, the portable mechanical keyboard also as a calculator with PBT Double-shot, R5 profile keycaps, and RGB backlit
Tentaku Mechanical Calculator Case by RyanGuy | Download free STL model | Printables.com