interesting digital watches

[knife31]

I had a Seiko watch with a circular slide rule back in 1975. My buddy bought one and used it as a Flight Engineer on a C-141. Back then they used regular Slide Rules, and he was taking a checkride and would look at his watch to do the calculations. The check Engineer would then ask him to borrow his slip stick. Later that evening in the bar the check Engineer asked why he kept looking at his watch, he thought that he was doing all the calculations in his head and hadn't seen such a watch.
Randy