took this to my jeweler to get it sized for my wrist.  He said it was an excellent Swiss mechanical movement; worn it for several days and its movement and spring last much longer than 24 hours and keeps excellent time; the cantilever clasp takes some getting used to close the watch, particularly after the slack is taken out of the band; I use my chin to pin the watch to my wrist while I manipulate the clasp to snap it closed.  The first time I could not do it, and that's when I had to resort to using my chin to hold the band in place...it can be done.  The cantilever closure must be a "safety" so that the watch will not fall off the wrist if the snap becomes undone.
At first it seems daunting.