I occasionally buy vintage slide rules especially if they're in a leather Case. I was in a thrift store as I am periodically looking for interesting things and came across a sealed plastic bag with many different things including two still sealed in their package Sterling 651 slide rules. I bought the bag actually thinking I could always use a metric converter the price was so low I gave it very little thought and when I got out to my car I opened the bag and googled the slide rule and that brings me to this point. I thought you might find it to be an interesting story. I enjoyed your writing it was very informative and I was very surprised at what I had bought, thanks again.

Been using slide rules since 1950. Still using slide rule for calculations and I am a Marine Engineer. so the calculations undertaken are not casualThe beauty of a slip stick./ guessing stick ? is its ability to function at all temperatures.Used it once in Quebec to calculate ballast weights to be moved for stability on a ship where all had frozen all the way to the top of mast in layers of ice. but also INCLUDING the my calculator's batteries..Still have three in my desk but now most often used in the STERLING metric convertor. ------- At 78 years old who the hell wants to learn a new system with a Sterling around I can think in one system and calculate in another.