> " You learn to freely use scientific notation with ease, and mental estimation to get the order of magnitude right."

This is what I was trying to get at in my other comment [1]!

[1] https://news.ycombinator.com/item?id=46872141

I have one of these Citizens, it was my first "nice" watch.

They're really cool

I have a Rotary Henley Chronograph and love using it for baking ratios.