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Few years ago I did a full rebuild of a top-of-the-line tube radio from 1958 and use it daily in my living room. My stereo tube amp is from 1963 or 1964. Both sound astonishing.
My binoculars are from WW II - era. I had to realign the prisms when I got them but the optics are about as good as you can get.
I also use an iPod Nano 2Gen almost daily, I think I bought it in 2008 and the original battery can still hold enough charge for 4-5 hours of continous play. Incredible device with a neat perfect UI. The physical jogwheel can be operated through pocket fabric, so I can switch songs or adjust volume while running without even having to remove the iPod from my pocket.
We had to take a mandatory IQ test at the beginning of military service, my score was in the highest percentile and because of this I ended up in officer training. It wasn’t the Mensa type test, they measured our language, math and pattern recognition skills with a vast battery of questions with a time limit.
Many friends of mine got average IQ scores in the army test but they are the ones who are really smart and extremely succesful.
In university I got a chance to take the Mensa type test and got ~140 points. I just laughed it off since at the same time I was struggling to pass my courses, while my friends who got average scores passed them with ease.
I do not consider myself really “smart” in any way, I just have a very good memory and I’m pretty adept at solving problems. Otherwise I’m just about as average a guy can be.