IWC

They created the waterproof(!) IWC Ingenieur SL Pocket Watch ref. 5215. Great watch. I owned the example in the pics here. Commercially a total fail. A few hundred (max.) produced and sold between 1982 and 1996. I loved it. But I sold it after a few years...  

a trip through the washing machine when you forget to take it out of your pocket.

HSTE

I wasn’t aware of it, even if the graph-paper 3506 is my favorite Ingenieur… Thank you so much for sharing it. Best, Emmanuel

Watch, Compass, Mirror in one Tiny Pocket and Pendant Watches ...