The Bo (though Kyndra called it Nanna)
Leica IIIc
Well, the smoker on the train has to blow his smoke down the toilet, because there's no smoking section on the electric train
Mt. Everest, unless you count something in the marianas trench... but you don't. I get the trick and that's the answer you're looking for.
He weighs iron to make sure he has the right amount for whatever tool he's building. He weighs gold to make sure he's getting paid the right amount (there's no cryptocurrency where he's from... no paper currency, either) He weighs wheat when he buys it from the miller. He weighs lots of things.