Hi, Just got my first Heuer, a ref. 347 NR from 1938-1946, so a soon to be 80 year old. Is there anyone here that can shed some more light on this reference, as there’s not so much to go on? I’we understood this to be the first wrist chrono after the bigger crossover, the Flieger? So could one say this to be the first wearable Heuer chrono? Any info much appreciated. The hands are relumed, any other observations? My next Heuers will most definitely be younger ones.