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Cake day: July 27th, 2024

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  • These are pretty simple calculators, those switches on top just change how the printing happens. You can set them to print with leading decimals (eg. adding a .00 to monetary values) and alignment to make reading easier. Otherwise it’s just a pretty standard calculator. Great machines, you still see them used for audits as a final hand-calculation stapled to the top of the paperwork.






  • The base looks like a Type S, as far as replacing it with an LED in a DIY fashion the leads are plain old 110v AC. You don’t want to put much more than 5w of LED in there, so you can probably get away with a basic capacitive dropper circuit that matches the LED you choose. Someone mentioned a starter, that is in the bulb base, not the socket on the microscope on these.