Originally posted by Geodude
This was my dad's Keuffel & Esser when he went off to college in 1931.
It became mine when I went off to college in 1971.
It served me quite well until I was able to purchase an HP-41C (which I still have).
I still have my Commodore programmable P50 that could accept 25 program steps. It cut my time compiling marks for report cards to 1/4 what it took before.
MY wife worked in Cancer research and she had one of the early HPs back in 1974. It cost $800 (1974 only) for 8 memories. These days, I can do better with my phone.