Braun ET23, 13 Euro for a working and in rather good condition was a price I couldn't resist. I don't have to write anything about the design but have a look at the ninth digit. It's used to signal various states,which I hadn't seen yet (#Sharp #ElsiMate or #PocketPC do not use them, do they?).

#VintageCalculators #Braun

Sharp surely did a good but 47 years later it's no wonder that at some the original 1977 batteries leaked.
#Sharp #VintageCalculators #EL8130
Hewlett-Packard clamshell calculators 😍
#RPN #vintagecalculators #hewlettpackard
TI Programmable 59 Calculator Diagnostic (Magstripe Read)

YouTube

It's been a busy week so far, but I managed to make a little time for one of my #VintageCalculators - #TexasInstruments #DataMath 2500B

It's missing a name badge just under the LED display. A little time spent with #Tinkercad, a bit of #3dPrinting and some time with my wife's craft supplies and I've got something that should be fine from a distance :)

@Computeforloot in other news, never fear, The Loan Arranger II will save you from financial ruin! #thrifting #vintagecalculators

Got this TI Datamath 2500B up and running last night. It needed a good clean in the battery compartment, and maybe a bit of deoxit on the key contacts.

Just missing the brand plate ID badge above the keyboard :(

Edit: Forgot, also put a protective coating (Modpoge) over the battery label as it was severely degrading due to battery leak.

#Calculators #VintageCalculators #Retro #RetroTech #TexasInstruments