Last year I published an article on the long and complicated story of Hebdomas, the 8-day watch with the exposed balance wheel. As I discussed then, the watch dates all the way back to 1889 and remains in production to this day, a remarkably long life for a fussy old fashioned design! But I did not then have access to some of the sources of information that inform my research today, and a few readers pointed out some areas I missed. Today I am diving deep into the origins of the Hebdomas, the inventor Irénée Aubry, the watchmaker Arthur Graizely, and the industrialist Otto Schild.